A state-of-the-art medical facility from the Imperial era is now a derelict ruin.

A restaurant and observation deck built in a unique broadcasting antenna.

Iran's colorful terraces are a rare geological masterpiece.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

With nearly double the depth of the Grand Canyon, this Peruvian canyon is one of the deepest in the world.

At 705 feet high, Brazil's "House of Stone" is the largest cave mouth in the world.

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

A bright turquoise river cascades beautifully down stepped terraces in southern China.

This natural wonderland is a unique chance to explore a Carolina bay, a mysterious geological formation of unknown origin.

This army of concretions is an unexplained geological phenomenon unlike anything else in the world.

A striking, menacing sandstone peak towering above a landscape that's equal parts Mordor and the Moon.

The bright red stripes streaking across the rocks are the star feature at this Icelandic waterfall.

In Northeastern Iceland lies something of an oxymoron: a steaming desert.

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

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

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

This stunning mountain lake was named for a pair of tragic lovers whose statues stand at the center.

Arguing within this idyllic, circular volcanic lake is forbidden.

The eerie remnants of an ancient forest were hidden under the sand for centuries.

A little-visited waterfall in an otherworldly landscape.

This non-profit theatre in the heart of Brussels is dedicated to hosting independent films.

A wonderfully kitsch bookstore the size of a supermarket.

Drink among marionettes at this pub inside a historic puppet theater.

This charming, hidden guild museum holds some 700 years of crossbow history.