A modern Nordic Pompeii on the Icelandic island of Heimaey.

An eerie, derelict amusement park in Berlin.

A man's head is enshrined beneath a statue near the first building constructed for the modern Olympic Games.

This small 16th-century church in Athens is almost entirely surrounded by a modern building.

These caves secretly held national treasures during World War II.

Large collection from the 3rd millennium BCE.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

Hideout of thieves, monks, and goat-footed gods.

This elephant kraal is the only one remaining in Thailand, dating back to the 16th century when these massive mammals were integral players in war and trade.

South Korea's love of the silly photograph is on full display at this goofy collection of trompe l'oeil paintings.

Plenty of old carney magic still haunts this photogenic amusement park.

Three columns of volcanic rock shoot out of the ocean.

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

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

If a glacial river suddenly diving into a sheer chasm via a dramatic, multi-stage waterfall isn't peak Iceland, it's certainly close.

Every summer local children form "pysja patrols" to save young birds that have wandered from their nests.

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

This valley of hot springs and boiling mud pots is home to the record-holding "Geysir," which originated the English word.

Iceland's largest geothermal mud pool is a little bit haunted and a little bit dangerous.

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

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

The summer tourists on these cliffs are thousands of seabirds.

Climb right into the heart of this colorful Iceland volcano.

Iceland's "Smoky Valley" is a beautiful river that is shrouded in a constant cover of steam clouds.