A collection dedicated to the treatment of disease, held in London's oldest hospital.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A historic London cemetery now serves as a nature park incorporating gravestones & memorial statues.

A cluttered and astounding collection of antiquities and curiosities.

A 2000-year-old Roman amphitheater lies just below Guildhall Yard.

A mysterious artist-run cabinet of curiosities and library.

This 1920s Dutch barge is now a floating bookstore.

The ruins of this gorgeous clifftop castle look like something from a fantasy novel.

An Oxford museum where visitors can have tea with the Mad Hatter and climb through the wardrobe to a fantasy land.

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

Tiny effigies of the victims of Edinburgh's famous Anatomy Murders.

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

An incarceration museum on the spot of possibly the oldest prison in England.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

Hear the quietest sound from across the dome.

The world's first underground farm is in a World War II bomb shelter beneath the streets of London.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Catacombs turned marketplace.

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