A subterranean house of worship carved right out of the bedrock.

An abstract monument to a symphonic composer.

Legend has this precariously placed rock was placed by giants. Science has another explanation.

This museum tucked below a charming cafe gives a brief snapshot of photographic history.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A statue marks the exact spot where The Boy Who Never Grows Up made his first literary appearance.

The monster at the center of the Darwin Center Spirit Collection.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

A naturally mummified 2,000-year-old man.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

Following the trail of an old metro line, this scenic path is haunted by a creepy spriggan statue.

The final resting place to 300 Victorian-era pets hides inside the city park.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

This churchyard arbor is surrounded by hundreds of gravestones placed there by author Thomas Hardy.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Erected in 1803, it is the first astronomical observatory that was built in the Americas.

It's hard to believe the dizzying patterns covering this abandoned mine are completely natural.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

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

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

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The National Railway Museum in York is the largest railway museum in the world, attracting almost 1 million visitors per year.