The site of the notorious Camp Sumter Prison is now a peaceful memorial.

Eons ago, a rushing lava river formed this pristine passage through solid rock.

The highest point in Arizona is an oddly snow-topped peak within the otherwise arid state.

An artificial crater field that trained astronauts for lunar exploration.

The artist James Turrell is repurposing an extinct volcano crater as an observatory to experience the cosmos.

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

The remains of Abó, Gran Quivera, and Qurai are monuments to the long, complicated history of the Indigenous people of the Southwest.

This lake—the second largest in the state— was hiding historic treasures beneath its surface.

This ancient village provides insight into the complexity of the pre-Columbian Fremont Culture.

Explore the cabin where the famed abolitionist once lived and the site where he fought the Battle of Osawatomie.

Plans for this peninsula included houses, the United Nations Headquarters, and a nuclear power plant. When none of them worked out, it became an expansive park.

A massive environmental project transformed this former smelter into a beautiful park.

An environmental art installation inspired by farmhouses and crop circles.

A tiny nondenominational church harkens back to the days of the first homesteaders in the region.

Colorado's oldest church is now home to the largest handmade adobe labyrinth in the world.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

The encased skull that is widely believed to belong to St. John the Baptist.

Science fiction's grandfather has a fittingly marvelous tomb.

A centuries-old complex of hand-dug stone chambers has sheltered locals in times of trouble.

This network of tunnels housed an entire village for years, and even had a hall for screening movies.

Behind this beachfront shop lies a spectacular, colorful sea cave with an equally colorful past.

Wild lights and sound effects turn a walk through some caves into an eye-popping 1960s tourist attraction.

Kayak out to a floating restroom.

Unusual white sandstone formations in the Los Padres National Forest.