Two women with a flair for both adventure and artful clutter created this singular round home.

These medieval tunnels provided water to the city above through centuries of civil war and plague.

The UK's oldest theme park slowly slips away.

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

An allegorical statue of a giant pregnant woman representing justice and truth.

A open air theatre built on a cliff by an eccentric British woman.

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

Inside this art museum resides one of Glasgow's most famous musical instruments.

This stately monument has been wearing a traffic cone hat for decades much to the delight of the locals.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

A six-ton wedding present for the King of the Scots.

Pop culture has helped to keep this iconic British building from being destroyed.

The commemorative stone column conceals a secret laboratory.

Hidden beneath the streets of London is a secret subway that only carried mail.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

In one Santa Monica parking lot a mushroom cloud made of chains heralds a message of peace.

A sign at the end of the Santa Monica Pier marks the traditional end of the legendary American highway.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

High on a hill overlooking Los Angeles lives a world famous, high power conical Tesla Coil.

Beneath the southern end of the Golden Gate Bridge is the “Gibraltar of the West Coast,” a fort built to protect the San Francisco Bay from naval attack.

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

A collection of 20th-century automata, penny arcade games, and musical contraptions.

A massively oversized measuring tape sculpture sits inside a hidden yard.

Massive puppet-automaton machines created by French artist collective Machines de l’Ile.