This 12-seat movie theater is the smallest in the world.

This futuristically sylvan church is a glass-enclosed marvel of modern architecture.

The subterranean "lake" below the Paris opera house inspired the Phantom of the Opera's lair.

An exquisite tunnel of cascading flowers.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

This supermarket offers shoppers a window into the past alongside their groceries.

Two men built this castle on the Florida coast as an artistic “landscape sculpture.”

A flight of this "ghost staircase" has 40 steps on the way up, but only 39 steps on the way down.

This Neolithic passage tomb forms part of a World Heritage Site.

An ancient chamber filled with wonderful rock art and a Neolithic carving of a human face.

A stone wall that mysteriously moved three feet from its foundation.

The severed head of a 17th-century Irish martyr lies within an intricate golden shrine.

This center tells the story of one of the most famous battles in Irish history.

The ancient tomb acts as a calendar that keeps perfect time.

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

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

400-year-old garden, restored to beauty.

Twin Peaks' real life Double R Diner has been restored to its damn fine television look.

The city of Rockford, Illinois is symbolically protected by a quartet of fittingly stony sentinels.

The ominously named cave is home to some remarkable ancient art.

Sleep in a glass pod dangling off a cliff.

This statue of Olympic hockey coach Herb Brooks immortalizes one of the greatest moments in American sports history.

Built in 1931, this small passageway is believed to be the first modern skyway.

During World War II the Thorp building was guarded by the OSS, FBI, and US Navy because of the top-secret bombsight being produced there.