Medicinal spa created with the discharge from a geothermal energy plant.

Inside this Icelandic greenhouse, geothermal energy keeps tomatoes warm and growing.

The oldest (maybe) swimming pool in Iceland is a stunning oasis built into the side of a lush hill.

Along this wire fence, travelers have been leaving a particular memento since 2012.

This wrecked airplane has been sitting on a black sand beach since the 1970s.

Three columns of volcanic rock shoot out of the ocean.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A fountain standing as a testament to a doomed alliance.

This remarkably well-preserved Egyptian plinth is pretty well traveled for a giant piece of stone.

The legendary luxury train passage is commemorated with a charming museum inside its former eastern terminus.

Climb a steep hill in 90 seconds on the second-oldest urban subway in the world.

One of the newest mosques in a city filled with thousands.

Hundreds of thousands of concrete bunkers crowd Albania long after the fall of Communism.

One of 200 religious buildings recognized as a “culture monument.” 

Gigantic water vessel, permanently grounded in Southern Albania.

Explore a traditional Albanian dwelling that pays tribute to the region's rich history.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

This beautiful 19th-century temple stands atop the ruins of its predecessor.

The unusually large seat sits atop the base of a ruined temple.

Go surfing on this urban wave, "hacked" by local surfers.

This is the largest cemetery in Ireland and the first cemetery museum in the world.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

A tiny microvalley etched into the side of Knocknarea Mountain hides another world.