This abandoned asylum in Wales might look haunted, but it's still beautiful.

A subterranean playground in an abandoned slate mine.

A rocky sea serpent hides caves, blowholes, and a spectacular natural bridge.

There are hundreds of secret WWII bases hidden in British forests. Built to fight a Nazi invasion, they remained unknown for decades.

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

An iconic red telephone box turned tiny art gallery.

This series of Scottish caves has no clear purpose other than baffling historians.

One of the oldest scientific gardens in Britain, containing more than 13,302 plant species in its core collection.

Some wattle-and-daub, a Moorish mural, a glacial erratic, and a Giant named Gilbert.

England's foremost purveyor of funeral furniture hasn't changed a bit since the 1960s.

The last occupied troglodyte dwellings in England weren't abandoned until the 1960s.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

An ode to the classic piece of British street furniture.

The grave of the legendary "Bonzo" can often be seen covered in cymbals and drumsticks.

The remains of an ancient bathhouse sit inside this aptly-named pub.

Semaphore saints, a golden dragon's head, and a stone carved with religious warnings all call this cathedral home.

A Reformation-era fiery figurehead once denoted this location as a print shop.

This medieval church is not only notable for its architecture, but also its connection with LGBTQ+ history.

An incredibly well-preserved piece of ninth-century Viking poop.

This memorial to World War II's fallen airmen shows us the movements of the stars that once guided them.

The little-known second castle that William the Conqueror built in York.

Makers and sellers of the original and finest York Ghosts.

One of the shortest streets in York has an especially odd name.

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