An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

This one-time health resort was used by aristocrats around the world.

Martin Bricelj Baraga's monolithic sculpture measures the blueness of the sky, and changes color to match it.

A whimsical bridge adorned with decorative dragons.

Yugoslavia's biggest underground airport lies in ruins.

An ethereal glowing blue ocean cave in Croatia.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

Mass Grave of 48 colonists killed in a raid by Native Americans and the French in 1704.

This massive tea kettle was once a promotional stunt for the Oriental Teashop.

An old trolley bridge was converted into a breathtaking garden bursting with colorful flowers.

Over fifty whirling pools left by the glacial age.

Monument to a suicide protesting the Soviet invasion.

This tipsy office building in downtown Prague was originally called “Fred and Ginger.”

What looks like a suicide in progress is actually a statue of Sigmund Freud.

Two monstrous faces loom over a village in Czechia.

Europe's largest natural bridge has a 19th century royal chateau built into its side.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Undone by Prohibition, this abandoned brewery-turned-flour mill is now ready for its third act.

This 40-foot fowl marks the so-called "wild goose capital of the world."

Erosion and time have created a naturally-formed water park.

The only arched bridge made of stone on the entire Mississippi River.

Equal parts record-breaking temple to consumerism and bizarre fun park, it's more than you think it is...

A fitting attraction for the corn capital of the world.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.