An unusual building on a "desolate hill" features the works of an Icelandic sculptor.

A plaque marks the former home of Käthe Paulus, an aerial acrobat who invented the modern folding parachute.

Dozens of large, brightly-colored paintings adorn the walls of the "street art capital of Iceland."

An abandoned village where the ruined foundations cling to a cliff.

This rare surviving broch is one of Scotland's most impressive Bronze Age structures.

An unexpected ghost village lurks on the southeast coast of Tenerife.

Not far from a popular beach, an unfinished, abandoned mansion for Bulgaria's last communist dictator.

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

This no man's land slicing through the island is strewn with abandoned relics of another time.

A world-class theater sits hidden in this remote town in West Iceland.

Rusted structures stand like ghosts of Cyprus' 6,000-year-old copper industry.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A winding, blood-red tunnel of hardened lava navigable by foot.

This plaque tells the story of an event that took place in an imagined parallel universe.

These ominous lava formations were said to be an entrance to the netherworld so of course they inspired a famous metal band.

These concrete domes were installed on an Icelandic bluff to honor a very specific musical tradion.

This mountain fissure hides a secret path to a secluded mossy grotto within the rock itself.

A whimsical and twisted animatronic monster tour beneath the streets of Berlin.

Lava stone structures possibly dating back to the 19th century may have been a stopping point for voyagers between ancient Egypt and the Mayan Civilization.