A "sinister, whimsical, tacky, and really orange" public art installation hidden under a Seattle bridge.

A French chateau, failed utopian community, odd museum, and Stonehenge replica in rural Washington State.

Rustic natural hot springs in the deciduous rain forest.

Seattle's own bad art museum located inside Cafe Racer.

A 100-year-old purveyor of curiosities, curios, and kitsch featuring mummies, shrunken heads, and a Fiji Mermaid.

A giant Troll lurks under one of Seattle's oldest bridges.

This former Norwegian sailor's church is slowly being taken over by ramshackle robot musicians.

The menacing creature had a tremendous influence on the local culture before being exposed as a hoax.

This circus town museum recognizes the outstanding clowns of history.

A group of artists transformed this desolate city alleyway into an outdoor gallery of street art.

A multiversal transit station located right below a highway interchange.

This naturally-sourced hot spring is now home to a clothing-optional resort.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

Countless stories attempt to explain Poland's mysterious J-shaped trees.

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

This coffee shop lies hidden beneath a historic church.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

An incarceration museum on the spot of possibly the oldest prison in England.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This 1920s Dutch barge is now a floating bookstore.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

A 300-year-old tea shop that brought tea to the English people, not to mention the Queen herself.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.