This disused Cold War bunker has been restored to all of its early 60s glory.

The abandoned transportation hub hides within the Glasgow attraction it once served.

The world’s first museum dedicated to the history of childhood opened in Edinburgh in 1955.

Used as an example in one of the first dictionary entries for "museum" in 1706.

The ornate structure is part of a building boasting more marble than the Vatican.

One of England's most famous churches hides a pair of little known architectural treasures.

A spooky juxtaposition of caves and graves gives this legend-filled cemetery a particularly haunting vibe.

More than a million titles fill the labyrinthine shelves of this prestigious private library.

This 16th-century house tells the city's history through old artifacts and quirky tales.

Tombstones and enigmatic inscriptions hide within a vault beneath a popular London arts venue.

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

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

This small museum in a 17th-century building honors three iconic Scottish writers.

A relic of Victorian grandeur hides beneath a busy South London road.

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

The 16th-century church has the only stained glass windows that survived the Scottish Reformation intact.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

An American ghost town hides along a side street in Scotland's capital.

Human-made caves excavated to hide a secret society of wealthy pagans.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

This secluded walkway overlooks a magnificently wild London green space.

Follow the original medieval paths that wind through this intriguing section of the city.

This Manchester laundromat is hiding something.

This foolish Victorian sea fort was converted to a deluxe hotel.