Mysterious hillside with a continuously burning natural fire.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

A fiery crater has been burning in the Karakum Desert since 1971.

The largest airborne operation in history was launched to capture this bridge.

A set of beech hedges planted in the 19th century forms a tunnel that takes on a different appearance in every season.

Building Men of War and Indiamen from Holland's Golden Age.

A collection of weird and wonderful art fills a former houseplant nursery.

This ghost town in Belgium will lose its street art when it ceases to exist.

This miniature take on the Kremlin is one Dutch man's retirement project.

Village situated on a narrow volcanic escarpment.

An Italian hillside ghost town.

On the coast of Sardinia, a once-great mining village is finding new life as a coastal resort town.

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

Icelandic folklore says this giant boulder was ripped from the mountains and placed at its current location, where it became home to elves.

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

A little known pile of scraps and plaques mark the grave of a downed RAF bomber.

This horseshoe-shaped waterfall is the second-largest on the African continent.

Abandoned ships along a deserted beach feel like the set of a post-apocalyptic thriller.

Shipwrecks, ruins, and turtles are all that remain on this haunting Caribbean ghost island.

Three bridges straddle a stream, one stacked upon the other.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

This derelict superstructure was a very important warning system for the Soviet military.

A huge Soviet-era robotics factory in the outskirts of Pripyat, now long-abandoned.