This bridge was designed to connect a road that never came to fruition.

Part ski resort, part modern art space, this lodge brings giant metal spiders and bloody doors to the Austrian Alps.

Museum devoted to the artificial language of Esperanto.

The Swiss hilltop housed an early 20th-century vegetarian nudist colony.

A Swiss amusement park entirely dedicated to the theory of ancient astronauts.

Featuring a meatless buffet fit for kings, this family-owned Zurich eatery is considered the oldest vegetarian restaurant in the West.

Centuries later, the victims of Great Britain's greatest hysteria are finally being remembered.

Giant statue of a disembodied head.

Led Zeppelin wrote some of their most iconic songs at this little 18th-century Welsh cottage.

The scene of the United Kingdom's most famous UFO incident, dubbed the "British Roswell."

The world’s largest magazine collection was born from a single shelf in a teen’s bedroom.

This 19th-century island fort built to protect against an invasion by sea.

The oldest working Brewery in Britain.

England's most famous front door has an accidental doppelganger.

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

A baffling beast so absurd a town councilman called it "intellectual vomit in technicolor."

Stroll through Welsh history in a village of reconstructed structures.

Tucked between a side street and a theater, this arch once led to a prestigious riding school, and now opens to a courtyard and community garden.

Museum dedicated to wax representations of disfiguring diseases.

A once-thriving hotel in the Swiss Alps couldn't compete with climate change.

A 19th-century funicular railway shuttles visitors up this surprising sea cliff to one of the world's largest camera obscuras.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

19th-century scientists would make the pilgrimage here to verify the precision of their measuring sticks.