This intriguing Bronze Age artifact spent centuries hidden within a Welsh faerie hill.

A mysterious shape catches the eye in this 16th-century painting.

This educational institution and reference library specialize in the psychic arts and mediumship.

It celebrates a very stinky task and salutes London's fatberg-vanquishing team.

Behind one of the world's most impenetrable vaults is a massive collection of retail silver.

This bewitching Babylonian goddess haunts a hallway of the British Museum.

It's a mystery why these remains were found with no traces of their bodies in sight.

Murals of the wild parties once held on the frozen River Thames.

This knockout museum lies in a sleepy corner of London.

A collection of machines designed to break things for science.

This East End pub gained notoriety as the site where gangster Ronnie Kray publicly shot a rival.

Shiny Brutalist box commemorates a pioneer of electricity and houses a railway transformer.

An unusual ode to the late Irish playwright, complete with a squiggly bust and coffin-shaped bench.

This open-air mosaic gallery honoring an English artist took hundreds of volunteers more than seven years to create.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

A museum wholly devoted to juvenescence.

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

The first tunnel to be dug beneath a river, repurposed as an art and museum space.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Drink your espresso at a Victorian-era urinal in this underground-restroom-turned-coffee-bar.

London's largest outsider art museum.

Dictionary Johnson’s favorite feline.