Thousands of exquisitely carved stone water storage wells, hundreds of stone steps fill this exquisite medieval stepwell.

A seemingly endless landscape of pure salt stretches far across Bolivia.

The fairy tale castle of the "fairy-tale king."

A toxic ghost town sitting atop a massive coal fire.

The ancient dwellings of the Puebloans, located in the cliffs of majestic mesas.

There aren't too many operational funiculars around, but Pittsburgh has two!

This indoor ski resort has a mountain contained inside a mall.

The only way to see Pittsburgh is from the top of this lookout point, just like the ancient members of the native peoples did.

This magnificent blue mosque in Afghanistan is surrounded by thousands of white doves.

A small island abbey is the final resting place of many medieval Scottish monarchs, including the real Macbeth.

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

An ancient capital city that dates back 3,000 years old and harbors many surprises.

The intricate stonework of Machu Picchu serves as a testament to Incan engineers.

Mural made of 100,000 pieces of hand blown glass, and until recently, the largest glass mural in the US.

Spinning silently in the lobby of an Art Deco masterwork is a massive vintage model of the Earth.

The remains of the furnace and iron works that produced the massive Hudson River Chain still stand in the woods of New York.

While only two of the ancient buildings at this site are actually churches this was one of the earliest Irish pilgrimage sites ever.

Hundreds of protractors affixed to surfaces all over the city.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

A grand New York post office that is home to mailman Santas, scraps of postal history, and a pneumatic mail system.

The one-time stronghold of the noble Douglas family, now home to ghost sightings and nesting birds.

This hands-on math museum believes in turning concepts into constructs.

This reclusive Hopi village in Arizona has been continuously populated longer than anywhere else in America.

The tallest outdoor elevator in Europe rockets passengers on a dizzyingly precarious ride to the top of a mountain.