The World's Deepest Hotel Room
Imagine sleeping 220 feet below the Arizona desert in a cavern formed 65 million years ago when an ancient inland sea covered what is now the American Southwest. The Grand Canyon Caverns Suite isn't just unique—it's the deepest hotel room in the world, and it's owned and operated by the Havasupai tribe along Historic Route 66.
Located at Mile Marker 115 near Peach Springs, Arizona, just west of Seligman and east of Kingman, the Grand Canyon Caverns are the largest dry caverns in the United States. What makes this place extraordinary isn't just the geological time scale—it's the authentic Route 66 heritage, the Havasupai cultural connection, and the sheer adventure of descending 200 feet underground via elevator to your bedroom.
What Makes This Special
65 Million Years of History: These caverns were formed within limestone that was once the bottom of an ancient inland sea that divided North America. The tour begins with an elevator ride that takes you 200 feet underground, where ancient waterways, a prehistoric sloth fossil, and even a 19th-century bobcat skeleton walk you through millions of years of geological history.
Havasupai Ownership: The Grand Canyon Caverns are owned and operated by the Havasupai tribe, whose ancestral lands include the spectacular Havasupai Falls and portions of the Grand Canyon. Staying here supports tribal tourism and provides an authentic connection to the region's indigenous heritage.
Historic Route 66 Location: This is more than just a cave—it's a piece of Americana. Located on the Mother Road itself, the property has welcomed Route 66 road-trippers for decades. The rustic Caverns Restaurant serves travelers, tour-takers, and inn guests with classic American fare in a perfect Route 66 setting.
The Underground Suite Experience
The underground suite is a bucket-list experience for adventurous travelers. You'll sleep in complete silence and total darkness (lights out when you want them), surrounded by 65-million-year-old rock formations. The temperature stays a constant 56°F year-round—bring warm layers! The suite includes comfortable beds, and while amenities are simpler than above-ground hotels, the experience is incomparable.
Above ground, the Grand Canyon Caverns Inn offers cozy rooms and roomy cabins at the cavern's edge. For those who prefer sleeping under the stars, the property features an RV park and campground. No matter your preference, you're perfectly positioned for exploring this unique corner of Arizona.
Tours & Nearby Adventures
Cavern Tours: Even if you don't stay overnight in the underground suite, the guided cavern tours are spectacular. Your tour guide will explain the geology, show you the prehistoric sloth remains, and tell stories of the cavern's discovery and use throughout history.
Route 66 Exploration: You're perfectly positioned to explore one of Route 66's most scenic stretches. Drive west to Kingman or east to Seligman (home of the inspiration for the movie "Cars"). Stop at roadside diners, vintage motels, and quirky roadside attractions.
Havasupai Falls: For thelucky few with permits, Havasupai Falls is a 10-mile hike from the Havasupai Indian Reservation village. These world-famous turquoise waterfalls are among the most photographed in the world. Check-in for Havasupai permits happens at the Grand Canyon Caverns, making this location convenient if you've secured a permit.
Grand Canyon West: The West Rim of the Grand Canyon (home of the famous Skywalk) is about 90 minutes northwest. This is the closest section of the Grand Canyon to Las Vegas and offers spectacular views without the crowds of the South Rim.
Planning Your Visit
Best Time to Visit: Spring (March-May) and fall (September-November) offer the most pleasant weather for exploring above ground, with temperatures in the 60s-80s°F. Summer can be extremely hot (100°F+), but the underground caverns stay cool year-round. Winter is quiet and peaceful, though occasional snow can affect Route 66 driving conditions.
What to Bring: For the underground suite, bring warm layers (sleeping bags or extra blankets), comfortable shoes for the cavern tour, and a flashlight. Above ground, bring your camera for Route 66 photos, hiking gear if you're exploring nearby trails, and plenty of water—this is the Arizona desert!
Dining: The Caverns Restaurant serves breakfast, lunch, and dinner with a diverse menu. Whether you're passing through on Route 66, taking a tour, or staying at the inn, it's the perfect place to relax along your journey.
Booking Your Underground Adventure
Book directly through Grand Canyon Caverns Inn Direct Booking or visit their official website at gccaverns.com. The property is open 7 days a week and can be reached at (928) 422-3223 for questions.
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