One man has installed bathtubs into the Utah desert floor to harness the powers of a natural hot spring.

Come for the speed, leave in love with the desert.

An earthwork sculpture built by Robert Smithson in the Great Salt Lake only reemerges during drought.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Roaming bison and a spectacular view at the highest point in Nebraska.

Take a drunken tour inside the world's largest known geode.

This modern castle sat empty for decades before a fire inspired its builders to complete its luxury halls.

The world's longest known cave system.

Prehistoric animals decorate this popular outdoor park.

One man is on a singular quest to name an island after a famous hip-hop artist.

This nearly endless university hallway is home to a unique sunset known as "MIThenge."

Naturally formed white marble arch housed in an abandoned marble quarry from the 1800s.

Resonating tubes make music from highway overpass.

One of the now-less-hidden floral gems of the "Emerald Necklace."

35,000 grape hyacinths flow like water down a garden hill.

This decrepit abandoned building is made all the more eerie by its dark history.

The walkable ruins of an 19th century hotel, destroyed in a horse cremation gone wrong.

A New England ghost town features a trail of boulders etched with intriguing life lessons.

A giant bronze coil of feces is both a tribute to doggie defecation and a reminder to pick it up.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

This futuristic German spa allows visitors to float in a pool of salt water while zoning out to underwater techno.

A spiral staircase twists to the top of this unusual Czech lookout tower.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

A little church on a tiny island looks like something from a fairy tale.