This former quarry is now a vibrant labyrinth of magical in situ sculptures.

One of the few places in the world home to living stromatolites.

Alien rock formations grown from the sands of an Australian national park.

This gracefully curving formation looks like a massive wave that was suddenly turned to stone.

Home to the last shore-based whaling station in Australia.

This tin chapel was built by POW's during World War II and is painted to look like something much more grand.

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

The fifth-longest suspension bridge the world, connecting one Michigan peninsula to another.

These enduring murals depicting a distinctly Marxist tribute to capitalism could not even be defeated by McCarthyism.

Berry Gordy Jr.'s old home was the original headquarters of Motown Record Corporation.

Take a walk in a recreation of ancient Rome.

The Bauhaus-style former industrial complex is considered the world's most beautiful coal mine.

This massive steel pyramid can be entered by a set of jagged steps that let visitors stand in its heart.

This "floating railway" is one of the world's oldest monorail systems.

Spanning the El Chorro gorge, this pathway used to be one of the most dangerous crossings in the world.

This abandoned gold mine found a second life as a post-apocalyptic film set.

Rare karst landscape eroded from a flat seabed.

Three bridges and one giant canyon make up this fantastic Spanish settlement.

One of the most spectacular bridges in Spain spans a narrow chasm that divides the city of Ronda.

This quaint Spanish village agreed to be painted blue as a marketing stunt but found that they preferred it that way.

This fort dates back to 1588 and was colonized by the Portuguese, Dutch, and English and sits prominently on the Indian Ocean where azure water lap the coast.

This abandoned Greek island was the last active leper colony in Europe.

A minotaur, a labyrinth, and a dubious restoration pull in visitors from around the world.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.