These layered sandstone mountains in China look like they are made of pressed crayons.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

This vertical pinnacle in China was the inspiration for the floating mountains in the movie “Avatar.”

A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

Climb down into the largest sinkhole in Qatar.

Raging waters have created a strange geological site that looks like something off of a progressive rock album cover.

After millennia of erosion by sand and churning water this Brazilian valley now looks like a lunar fantasy.

A massive natural rock arch gives the Tuscan mountain its own window to the sky.

A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

An ancient Scottish rock formation said to be the gravesite of a giant remains ensconced in legend and intrigue.

Strange rock formations tower above the river that snakes through this enchanting Icelandic canyon.

Rare recess caves fill this unbelievably beautiful Ohio park.

This extraordinary geological oddity resembles human-made pavement.

Islanders once used this dramatic, otherworldly landscape to hide their cattle from Viking raiders.

The land is full of geologic eye candy, such as otherworldly spires, mushroom-shaped hoodoos, and prehistoric fossils.

This charmingly homemade amusement park has been growing for 40 years.

A vault of safe-deposit boxes in an old bank has been repurposed as a time capsule of Hispanic culture.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

One of the world's richest men bought this former paper factory and transformed it into a mall.

An 18th-century Catholic church converted into an eccentric temple of music and bacchanalia.

You can row a boat through this ancient underground reservoir.

A restored Pittsburgh house of God has been converted to a marvelous house of suds.