As can be expected from a centuries-old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

Devilish masks, handicrafts, and pieces of old buildings create a snapshot of life in a historic Alpine region.

This contemplative sculpture made out of old machine parts is meant to be the first in a series of sculptures around the world.

A novel collection of medical curiosities housed in an 18th-century surgeon training academy.

A crucified and bearded female saint.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

An existential riddle in the world's largest ancient castle.

The hidden lair of an alchemist rediscovered in a 2002 flood.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

An eccentric Victorian aristocrat's enormous collection of medieval armor and weapons from around the world.

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

Catacombs turned marketplace.

A house of bones — but nobody is quite sure to whom they belong.

The ruins of a Roman fort lie in the shadows of an imposing medieval castle.

An avant-garde artist is survived by his seaside garden.

This little blue house pokes out over the campus of UC San Diego, seven stories high.

A futuristic-looking beach house built for the owner of a snack food brand.

A dramatic coastline that’s home to a rare pine tree.

This boat represents the promise of undiscovered territory, a dream of hope, and progress and freedom for Iceland.

An ancient neolithic tomb that only sees the sun twice a year.

You can see three Irish counties from this Neolithic hillside fort, once the seat of the Kingdom of Ailech.

Roots and stumps that lay inundated for two millennia are on display in Japan's city of three mysteries.

The world's largest drain sits below the city of Kasukabe, Japan.

A Buddhist temple to honor insects that died for science.