Black cat statues guard this temple-like Egyptian revival factory.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.

A labyrinth hides in plain sight at each of the city's 270 Tube stations.

The remains of Crystal Palace Great Exhibition of 1851.

One of the oldest trees in Britain may have been witness to some of the country's formative moments.

The geoglyph once sported a glass bottle eye.

Destructive children, start your engines.

A science teacher's dream.

This Art Deco theater is the last remaining opera house in the “little Broadway of the North.”

A former Oz-themed attraction that has fallen into disrepair, but still holds some of the original magic.

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

A psychological self-portrait in the form of a giant, segmented head.

This ancient Irish landscape boasts hundreds of legendary ruins.

Unique Michigan homes look like something out of Tolkien's "The Lord of the Rings."

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

A subterranean playground in an abandoned slate mine.

Fresh wooden posts have been added to ancient holes to recreate a primitive henge clock.

Once one of the world's great cities, Cahokia was a place of religious worship, trade and mass human sacrifice before being mysteriously abandoned.

After miraculously surviving a giant flood, the 19th-century nut tree and its offspring are protected with their own tiny park.

A creepy sculpture of a decapitated head invites viewers to see St. Louis through its empty eyes.

One of few surviving standpipe water towers in the U.S.

This monumental Jesus is often referred to as "Our Milk Carton With Arms."

This century-old roadside attraction is full of bizarre rock formations.

A home designed to be on the cutting edge of comfortable, low-cost living.