Places Peepi Wants to Go

A cave dwelling that was started by the Celts, expanded by monks, and finished by knights.

This French ghost town from World War II has been left as a memorial to German atrocities during World War II.

Explore an eerie, abandoned medieval citadel.

A 14th century bridge built as a fortress, where the devil lurks on one of its towers.

Ancient paintings known as the "Sistine Chapel of Cave Art."

Two towns are linked by an engineering marvel masquerading as a boring suspension bridge.

Abandoned 18th century weapons factory in the Aezkoa Valley.

This narrow path was cut right into a French mountainside to feed the country's early naval expansion.

Abandoned Nazi train station turned underground astroparticle laboratory.

This religious complex carved into a cliff is steeped in legends of miraculous stags and the Holy Grail.

32,000 tiny soldiers are posed in 23 historical settings.

This huge abandoned fortress hidden inside a mountain holds a world of subterranean secrets.

A landscape decorated with enormous skull sculptures.

A Franco-era dam flooded (almost) everyone out of this centuries-old Aragonese town.

A painted medieval castle where the most celebrated outlaw-poet of the Middle Ages was imprisoned — and where you can descend into his exact cell, nine centuries later.

A beautiful and classically designed villa, with an hourly infestation of monsters.

Miles of man-made caves and tunnels are currently used for cultivating mushrooms.

This museum preserves over-the-top masterpieces that once qualified artisans for membership into a medieval guild.

Naturally protected city carved from a rock face.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

This ancient subterranean megalopolis is known for the hot oil traps that were installed above each of its entrances.

While not Turkey's deepest underground city, this subterranean redoubt is the largest.

The deepest underground city in Turkey was designed to protect 20,000 people behind massive stone doors.

The only residents of this abandoned housing development full of identical castles are stray cats and dogs.