The Avenue of Mausolea is a series of grand palatial tombs.

Extravagant mosque honors modern Islam.

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

The small cliffside monastery known as the Tiger's Nest is said to be the meditation site of an 8th-century Buddhist master.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A derelict New Zealand-themed amusement park in Japan.

A fifth-century temple improbably built into the side of a cliff.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

This "preacher's pulpit" once used for pagan ritual, is home to a new, and dangerous ritual.

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

A Turkish monastery tucked into a cliff wall.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

An eatery in a shallow river where diners can enjoy their meal mere feet from the base of an artificial waterfall.

A magical world of elves and fairies tucked amongst the trees in Colombia.

A dangling church built over a Colombian gorge.

The largest stone moai on Rapa Nui.

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

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

Of course Salvador Dalí lived in a castle...

The birthplace of an eccentric alchemist and possible inspiration for the fictional reanimator of monsters.

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

The remains of a grand castle that may have inspired Bram Stoker's Dracula.

California's own medieval Italian castle, authentic down to the 300-year-old iron maiden in the dungeon.

This 4,000-foot-diameter hole is touted as "the most well known, best preserved meteorite crater on Earth."