A mountain range on an active U.S. Navy base hides thousands of mysterious prehistoric rock carvings.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

No one knows how this Pacific Northwest spruce tree came to have so many trunks.

Concrete crosses scattered across the Arizona scrubland which were used to align spy satellites.

Ozymandias’ time-keeping temple.

A small canyon with petroglyphs and a seasonal waterfall, only a short hike from the remnants of old Route 66.

A nature and cultural preserve named for its multitude of petroglyphs carved by the Northern Sinagua people.

Although now a decaying ruin, this stone cabin's history includes several notable figures.

Religious statues built because of one man's bargain with God fill this peaceful sculpture garden.

The remains of what was the most important religious complex in coastal Peru for over a millennium.

This 24-acre park offers a place for meditation in the midst of Sedona's iconic red rocks.

The world's only teal arches exist in a city that cares more about its aesthetic than an Instagram influencer.

Outsider Art Community.

The state's only comprehensive museum dedicated to the mineral that defined its history and economy.

Inside this store, a mysterious statue draws visitors from the world over.

On the outskirts of a reborn ghost town, a decaying post office remembers the bad old days.

The largest and most well-preserved petroglyph site in the Verde Valley.

A partial tunnel blasted into a steep ridge is all that remains of a failed railway across Arizona.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Inside this garden, visitors are offered a glimpse into how inhabitants of the region survived centuries ago.

This comprehensive collection features Native American artifacts dating back centuries.

A once popular resort—said to be the vacation spot of gangster Al Capone—now remains abandoned in the woods of Arizona.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.