Huge concrete structures designed as an early warning system for Britain to detect enemy aircraft.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

Installed at a chaotic intersection, this gave London traffic cops a place to hang their heavy woolen coats.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

Hidden on a cobblestone street in Glasgow, a Czech Cajovna-inspired teahouse serves as a hangout for Bohemians.

Revel in the Victorian splendor of the world's oldest eating establishment inside a museum.

A plaque hangs near the execution place of the Scottish Independence leader famously depicted in "Braveheart."

A remarkably well preserved tower dating all the way back to the Iron Age.

This Scottish bridge seems to compel dogs to leap to their death.

Collection dedicated to brands, packaging and advertising.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

London's smallest police station is barely the size of a phone booth.

A historic house left in "dramatic still life."

This tangled English forest looks like something right out of a fairytale.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

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

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

This astonishingly geometric cave has inspired everyone from Jules Verne to Pink Floyd.