An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

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

This Japanese-inspired labyrinth of hot springs is hidden in a Chilean forest.

The Mysterious Witch Bonney, a haunted statue in an old industrial city.

Mirrors and glass shards cover every inch of this arrestingly beautiful mosque.

The 10,000 Torii shrine.

Sitting on an Italian hilltop is this surreal fortress built by the mad inventor of electrohomeopathy.

Sloth rehabilitation center in the jungle of Costa Rica.

Prison made famous by The Shawshank Redemption has been out of commission since 1990.

Japanese company creates clone dolls that reside in the "uncanny valley."

Known as the "Dodo Manège," this carousel features a herd of animals that have disappeared—or may be gone soon.

A surrealist timepiece by the artist of melting clocks.

The only Bahá'í house of worship in North America and one of only a handful worldwide.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

A suspended garden, now gone, once hung in the middle of this abandoned church.

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

Neither Spanish settlers nor anyone since has been able to tell who built these strange California rock walls.

The man who first patented the Ouija board rests in peace beneath a headstone that playfully reflects that achievement.

This massive store is home to an eccentric collection of vintage, retro, and peculiar goods.

Travelers exchange letters with woodland creatures at this mini post office.

Contemporary art inspired by natural history and science drawing on ancient techniques in a modern world.

These spooky and unusual stone formations create an underworldly landscape.

This historical theme park celebrates all things noodle.