Small church on top of a huge rock column.

Underground monastery and fortress.

Ancient rock-hewn town that witnessed key events of Georgian history.

An ancient necropolis of magnificent tombs.

This 700-year-old Cyprus castle is the birthplace of the world's oldest wine, said to be toasted by Richard the Lionheart at his wedding.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

Single runway interrupted by a busy road that cuts across its middle.

Dead weights honor the dead of Portugal's fishing industry.

This fairytale-like structure is the last turf church ever constructed in Iceland.

Cairns built to bring travelers good luck stretch across the land like miniature stone mountains.

A three-story tower of books about Abraham Lincoln is one of the more unusual monuments to the president.

This irregularly shaped sea fortress has defended not one but three different sovereign states.

One woman's lifelong collection is on display in this unassuming house on an Icelandic fjord.

A spiritual vortex among the red rocks in Sedona.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

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

A sharp bend in a dramatic river canyon cut through red rocks.

Most-visited and most-photographed slot canyon in the American Southwest.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

The oldest housing complex in Riga is a mini timeline of architectural trends.

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

The rusted hull of a WWII German destroyer pokes above the surface in a Norwegian fjord.