The damming of the Colorado River buried an iconic geologic formation before record-breaking drought brought it back.

These unique rock formations were created during the Ice Age.

A dozen U.S. presidents have stayed at the historic resort, which was known as James Buchanan’s “Summer White House” from 1857-1861.

Narrow gorges and deep pools created by long-ago glaciers.

This shop filled with oddities and knick-knacks is named for a 19th-century charlatan.

The first of Lancaster's "rural cemeteries."

A unique workspace where offices reside on pirate ships and inside gingerbread houses.

A miniature golf course crafted inside the world's largest simulated cave.

The only geyser in the state of Pennsylvania is caused by pressure from an abandoned coal mine outside of the ghost town Centralia.

The remains of a community that was forced to move for a dam that never materialized still rot in this Pennsylvania park.

These tourist trap caverns are said to be the former home of a legendary Pennsylvania Hermit.

A stone arch leads to a cavernous 1930s spring house tucked away in the Pennsylvania woods.

Mysterious rocks that ring musically when struck.

A layered tribute to the work of mosaicist Isaiah Zagar.

America's most famous museum of medical oddities is home to the remains of Albert Einstein's brain.

An excursion train traverses a picturesque red-rock canyon along the Verde River.

Red sandstone structures dominate this landscape, which has been inhabited for some 5,000 years.

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

The biggest solar telescope in the world helps reveal the secrets of our sun.

This old selenite mine is dotted with tiny crystals that make it shimmer like it's covered in glitter.

More than 300 years ago, a revolt at this Hopi pueblo shaped the future of the American Southwest.

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

Hike the unusual hoodoos and rock formations that form this little-known natural wonder.

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