Climb to the top of its spiral spire for spectacular views of Copenhagen.

The southernmost outpost of the Russian Empire in colonial America.

The concrete skeletons of an abandoned Swedish town hide among the trees.

An ancient Incan convent on Lake Titicaca's Island of the Moon.

This ancient Roman arch misled treasure hunters for centuries.

Few of the many visitors to this resort town know of its hidden Maya ruins.

This enchanting mountain plateau celebrates spooky local folklore.

The ruins of this medieval tower are destined to crumble into the sea.

Flames have been burning within this mountain for more than 2,500 years.

At the right time of day, sunlight floods through the roof of this cave and illuminates the small pavilion hidden within.

This church carved into the rocks is full of enchanting stone statues.

These legendary stone steps were once used to haul coffins up the rockface.

A semi-abandoned village destroyed by U.S. bombings during World War II dominates the valley of Turano.

This museum dedicated to divination also honors a local 10th-century prophetess.

It's a mystery how these curious columns wound up in an Edinburgh suburb.

Dozens of large-scale, creative, evocative curios from prominent artists dot the calm outdoor space around this major museum.

The biblical sculpture honors those who lost their lives, homes and communities to the Chernobyl disaster.

Historical figures from New York City's Catholic community reside in Midtown.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

This ancient Irish landscape boasts hundreds of legendary ruins.

These magnificently sculpted tombs represent Spain's own legendary version of "Romeo and Juliet."

Hiding behind a grocery store is a spectacular cavern carved as part of an old limestone quarry.

This unique medieval artwork featuring the story of the Antichrist remained lost for decades.

Traveling this mountain pass reveals quaint stone buildings, stunning Irish scenery, and a bridge said to grant wishes.