The 11 Most Unbelievable Natural Wonders on Hawaii – #3 Looks Like Another Planet

Living on Oahu for over three decades and exploring every corner of all Hawaiian islands countless times, I’ve witnessed nature’s most incredible masterpieces. From volcanic moonscapes to emerald valleys, these islands hold secrets that most visitors never discover. The eleven natural wonders I’m sharing aren’t just beautiful – they’re absolutely mind-bending. Let me take you on this journey through Hawaii’s most unbelievable landscapes.

Diamond Head Crater Summit Views That Stop Hearts

Standing 760 feet above Waikiki, Diamond Head offers more than just Instagram shots. This 300,000-year-old volcanic crater provides panoramic views that stretch from Koko Head to the Waianae Mountains. The moderate 1.6-mile round-trip hike takes you through military tunnels built in 1908, revealing Hawaii’s strategic importance during World War II.

The summit rewards hikers with breathtaking vistas of Honolulu’s skyline, pristine beaches, and on clear days, the neighboring islands of Molokai, Lanai, and Maui. Early morning visits (6 AM when gates open) offer the best lighting and fewer crowds. The trail includes steep stairs and a 225-foot tunnel, but the payoff is extraordinary.

Pro tip: Bring a small flashlight for the tunnel section, even though it’s lit – the backup lighting can fail during maintenance periods.

For accommodations near Diamond Head, the OUTRIGGER Waikiki Beachcomber Hotel offers an excellent location and amenities. The Hyatt Regency Waikiki Beach Resort & Spa provides luxury options.

Na Pali Coast Where Earth Meets Heaven

Kauai’s Na Pali Coast stretches 17 miles of sheer cliffs rising 4,000 feet from the Pacific Ocean. These emerald-green pali (cliffs) create narrow valleys that ancient Hawaiians once cultivated with taro terraces. The coastline remains accessible only by foot, boat, or helicopter, preserving its pristine wilderness character.

The Kalalau Trail provides the only land access, beginning at Ke’e Beach and winding 11 miles to Kalalau Valley. Even the first two miles to Hanakapiai Beach reveal spectacular views. Sea caves, waterfalls cascading directly into the ocean, and secluded beaches create an otherworldly experience that inspired countless Hollywood films.

Helicopter tours offer breathtaking aerial perspectives, while boat excursions reveal sea caves and marine life, including dolphins and Hawaiian monk seals. The dramatic landscape changes throughout the day as light and shadow play across the ridges and valleys.

Haleakala Crater: The Martian Landscape on Earth

Here’s where things get truly alien. Haleakala’s summit crater on Maui resembles Mars more than Earth. This massive depression spans 7 miles long, 2 miles wide, and 3,000 feet deep. The barren landscape features cinder cones, volcanic rock formations, and an eerie silence that makes you question which planet you’re standing on.

The 10,023-foot elevation creates a lunar-like environment above the clouds. Sunrise viewing draws thousands, but the real magic happens during off-peak hours when you can experience the profound silence and otherworldly terrain. The temperature drops dramatically – often 30-40 degrees cooler than sea level.

Hiking trails descend into the crater, passing through multiple climate zones. The Sliding Sands Trail leads through this Martian landscape, where NASA actually trained Apollo astronauts. The endemic silversword plants, found nowhere else on Earth, add to the alien atmosphere.

Insider tip: Visit during weekdays between 10 AM – 2 PM for smaller crowds and better crater visibility without the morning cloud cover.

The Fairmont Kea Lani Maui offers luxury accommodations with easy access to Haleakala. For vacation rentals, check VRBO’s Maui selection

Thurston Lava Tube Underground Alien Highways

Deep within Hawaii Volcanoes National Park, the Thurston Lava Tube (Nahuku) creates an underground cathedral formed by flowing lava 500 years ago. When the outer lava cooled and hardened while molten lava continued flowing beneath, it left behind these hollow tunnels.

Walking through the 500-foot illuminated section feels like entering a spaceship. The smooth, rippled walls show where molten rock once flowed, while the ceiling displays natural formations that defy description. The temperature remains constant at 68°F regardless of outside weather.

The short loop trail begins in a native ohia forest filled with bird songs before descending into the geological wonder. Fern forests surround the entrance, creating a mystical atmosphere that adds to the underground adventure.

Multiple lava tubes exist throughout the park, though Thurston remains the most accessible. These natural highways once transported lava from Kilauea’s source to the ocean, building the Big Island layer by layer over millennia.

The Hawaii Volcano House provides the closest accommodation to the park. For budget options, SCP Hilo Hotel offers convenient access.

Rainbow Falls Where Water Dances With Light

Rainbow Falls (Waianuenue) on the Big Island creates natural rainbows in its mist during sunny mornings. The 80-foot waterfall plunges over a lava cave that Hawaiian legend claims houses Hina, goddess of the moon. The best rainbow viewing occurs between 10-11 AM when sunlight hits the mist at the perfect angle.

The easily accessible waterfall sits just minutes from downtown Hilo. A short walk leads to multiple viewing platforms, while a slightly longer hike reaches the top of the falls. The surrounding tropical landscape includes wild ginger, monstera, and massive banyan trees.

During heavy rains, the falls transform from a gentle cascade into a thundering torrent. The pool below remains off-limits for swimming due to dangerous currents and sharp lava rocks beneath the surface.

Boiling Pots, located upstream, showcase hexagonal basalt columns formed by slowly cooling lava. These terraced pools bubble and churn, creating the illusion of boiling water even when temperatures remain normal.

Waimea Canyon: The Grand Canyon of the Pacific

Waimea Canyon on Kauai stretches 14 miles long, up to 3,600 feet deep, and displays incredible geological layers spanning millions of years. Mark Twain never actually called it “The Grand Canyon of the Pacific,” but the nickname stuck because of its dramatic red rock formations and expansive vistas.

The canyon formed through both gradual erosion and catastrophic volcanic collapse. Red dirt (from iron oxide) washes into streams during rains, giving Waimea its name – “reddish water” in Hawaiian. Multiple overlooks along Waimea Canyon Drive offer different perspectives of this natural wonder.

The Waimea Canyon Lookout provides classic postcard views, while Pu’u O Kila Lookout reveals the mystical Kalalau Valley beyond. Hiking trails range from easy walks to challenging multi-day adventures into the canyon’s depths.

Pro tip: Early morning visits offer clearer views before afternoon clouds roll in. The canyon’s appearance changes dramatically throughout the day as light shifts across the formations.

Stay at The Lodge at Kukuiula on Kauai’s south shore. For vacation rentals, explore options.

Punaluu Black Sand Beach Where Turtles Rest

Punaluu Beach showcases jet-black sand created by volcanic activity meeting ocean waters. When hot lava hits cold seawater, it explodes into tiny glass fragments that form these striking beaches. The contrast between obsidian sand, blue-green water, and coconut palms creates an otherworldly scene.

Hawaiian green sea turtles (honu) frequently bask on the warm black sand, making this beach a wildlife viewing destination. These endangered creatures can weigh over 300 pounds and live for decades. Federal law requires maintaining at least a 10-foot distance from resting turtles.

The black sand absorbs heat, making barefoot walking challenging during midday. Early morning or late afternoon visits provide more comfortable temperatures and better turtle spotting opportunities. The beach lacks shade, so sun protection becomes essential.

Swimming conditions vary significantly with weather and surf. Strong currents and sharp lava rock create hazardous conditions for inexperienced ocean swimmers. Local knowledge proves invaluable for safe water activities.

Mauna Kea Summit Above the Clouds

At 13,803 feet, Mauna Kea’s summit rises higher than Mount Everest when measured from the ocean floor. This dormant volcano creates a lunar landscape above the clouds where world-class observatories take advantage of exceptional viewing conditions.

The summit’s thin air contains 42% less oxygen than sea level, creating altitude effects for many visitors. The landscape resembles moon terrain so closely that NASA used it for astronaut training. Cinder cones, barren lava fields, and sparse vegetation create an alien environment.

Access requires four-wheel drive vehicles for the final 6 miles of rough gravel road. The Visitor Information Station at 9,200 feet provides acclimatization time and educational programs. Most tour companies handle transportation, allowing visitors to focus on the extraordinary experience.

Surprising fact: Snow frequently caps Mauna Kea during the winter months, creating the unusual sight of snow-covered tropical islands. The Hawaiian word “mauna kea” actually means “white mountain.”

Stay at Mauna Lani Auberge Resorts Collection for luxury Big Island accommodations . Budget travelers can choose Kona Tiki Hotel.

Kilauea Volcano: Where Earth Creates Itself

Kilauea, one of the world’s most active volcanoes, has erupted continuously since 1983 (with brief pauses). The Halemaumau crater within Kilauea’s summit caldera showcases Earth’s creative power through glowing lava lakes and dramatic eruptions.

Recent volcanic activity dramatically reshaped the landscape, creating new land while destroying over 700 homes in lower Puna during 2018’s massive eruption. The crater floor collapsed 1,600 feet, fundamentally changing this natural wonder’s appearance.

Hawaiian legend identifies Halemaumau as Pele’s home – the goddess of volcanoes and fire. Traditional Hawaiian protocol requires respectful behavior near these sacred sites. Offerings like ti leaves, flowers, or small stones express proper reverence.

Chain of Craters Road descends 3,700 feet through various volcanic landscapes, ending where recent lava flows crossed the highway. The 20-mile drive showcases how volcanic activity continuously reshapes these islands.

Current eruption status changes frequently. Check the Hawaii Volcanoes National Park website or call (808) 985-6000 for real-time information before visiting.

Akaka Falls Tropical Paradise Perfection

Akaka Falls plunges 442 feet through lush rainforest on the Big Island’s Hilo side. This narrow ribbon waterfall creates a misty microclimate supporting dense tropical vegetation, including bamboo groves, wild orchids, and native bird species.

The short loop trail winds through a tropical paradise showcasing Hawaii’s natural beauty. Kahuna Falls, a smaller 300-foot waterfall, appears along the same trail. The paved path makes this wonder accessible for most fitness levels.

Heavy rainfall in the watershed feeds these falls, with flow varying seasonally. Winter months typically provide more dramatic displays, while summer may reduce the falls to gentler cascades. The surrounding rainforest remains spectacular regardless of water levels.

Native Hawaiian honeycreepers and other endemic birds inhabit this forest, though introduced species now dominate. The biodiversity represents both Hawaii’s natural heritage and the challenges facing native ecosystems.

Local knowledge: Visit during weekday mornings for peaceful experiences without tour bus crowds. The loop trail takes 45 minutes at a leisurely pace.

Papakolea Green Sand Beach: Nature’s Rare Gem

Papakolea Beach creates one of only four green sand beaches worldwide. Olivine crystals from nearby Pu’u Mahana cinder cone create the distinctive olive-green sand color. These heavy crystals remain while lighter materials wash away, concentrating the green minerals.

The remote location requires a 2.5-mile hike across rough lava rock or booking local transport (which supports the community). South Point’s constant trade winds and lack of shelter create challenging conditions. The hike traverses a barren landscape offering little shade or comfort.

Swimming conditions remain dangerous due to strong currents, sharp rocks, and powerful waves. Most visitors focus on photography and experiencing this rare geological phenomenon rather than water activities.

Ono kine (that’s really good) – as locals say, this beach represents Hawaii’s unique volcanic origin story. The olivine crystals tell the tale of deep-earth minerals brought to the surface through volcanic processes spanning millions of years.

The challenging access preserves this natural wonder from overcrowding while supporting local families who provide transportation services.

Waipio Valley: The Valley of Kings

Waipio Valley, known as the “Valley of Kings,” served as the political and spiritual center of ancient Hawaii. This amphitheater-shaped valley stretches one mile wide and six miles deep, enclosed by 2,000-foot cliffs and featuring Hawaii’s tallest waterfall, Hi’ilawe Falls.

The fertile valley floor once supported thousands of Native Hawaiians through extensive taro cultivation. Sacred sites, royal residences, and temples filled this verdant paradise that early Hawaiians considered the center of their universe.

Access requires four-wheel drive or hiking down the extremely steep 25% grade road. The black sand beach at the valley floor remains dangerous for swimming due to strong currents and powerful surf. Most visitors experience Waipio from the scenic overlook.

Wild horses roam the valley floor, descendants of animals left by early settlers. The isolation has preserved much of the valley’s natural character while allowing limited sustainable agriculture and residence.

Insider tip: The overlook provides spectacular views without the challenging descent. Sunrise and sunset offer the most dramatic lighting across the valley walls and waterfalls.

For Big Island accommodations near Waipio, consider vacation rentals. The Hamakua Hotel offers budget-friendly options.

Planning Your Natural Wonder Adventure

These eleven natural wonders showcase why Hawaii remains one of Earth’s most extraordinary destinations. Each island offers unique geological features created by volcanic activity, erosion, and millions of years of natural processes.

Essential planning considerations:

• Allow multiple days per island for proper exploration
• Check the weather and volcanic activity before visiting
• Respect cultural sites and follow Leave No Trace principles
• Bring appropriate gear for hiking and changing conditions
• Consider guided tours for complex or remote locations

The diversity ranges from easily accessible roadside wonders to challenging multi-day adventures. Whether you seek Instagram-worthy photos or profound natural experiences, Hawaii’s natural wonders deliver memories lasting lifetimes.

Remember that these living landscapes continue evolving through ongoing volcanic activity, erosion, and climate change. What you see today may differ from future visits, making each encounter with these natural wonders truly unique.

From the alien landscape of Haleakala to the emerald depths of Waipio Valley, Hawaii’s natural wonders prove that paradise exists – you just need to know where to look. Malama ka aina (care for the land) as Hawaiians say, and these incredible places will continue inspiring visitors for generations to come.