This innocuous-seeming building is actually the remnant of a major wartime brothel.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

An Iron Age fort on the edge of a seaside cliff offers a glimpse into an ancient, mystical world.

Obelisks and stone pineapples in the Irish countryside.

Local legend says the remains of Father Christmas lie within the medieval grounds.

A fantastic reconstruction of a 10th-century Viking longhouse.

Instead of solid circles, the stoplights in this northern Icelandic town have glowing red hearts.

Iceland: home to volcanoes, waterfalls and, apparently, Santa?

The oldest steel ship in Iceland has been beached for years and is now a rusting ruin.

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

An encyclopedic collection of mammal penises.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

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

This eye-popping Icelandic crater lake is surrounded by red volcanic rock.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

In a country where driving from one town to another is literally impossible, this small stretch of gravel is a remarkable feat.

A surprisingly beautiful abandoned World War II military base in East Greenland.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

A subterranean playground in an abandoned slate mine.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

An American ghost town hides along a side street in Scotland's capital.

These ruins witnessed the final gathering of the failed Jacobite Rebellion.

Built to hold the worst of the worst of the Nazi war prisoners.

This tiny island featuring 9th-century Viking ruins is only accessible at low tide.