Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

A cluttered and astounding collection of antiquities and curiosities.

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

Hear the quietest sound from across the dome.

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

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

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

Remnants of a Victorian garden feature sitting in public woodland.

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

The hidden "ballroom" under a mansion lake was built by a criminal who ate a cyanide pill during his trial.

A vast overgrown cemetery, once known as one of London's "Magnificent Seven."

An unusual round church in London with a Templar past.

A special shop catering to the needs of things that go bump in the night, and also helps kids become writers.

A little slice of Japan and its aesthetics in London's Holland Park.

Catacombs turned marketplace.

Rebuilt remains of a temple to Roman god Mithras.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

One part local history, 99 parts gruesome haunted house.

A subterranean ice warehouse that has lain hidden beneath central London for over a century is now open to the public.

This 1920s Dutch barge is now a floating bookstore.

The sign at the garden gate reads: "These Plants Can Kill."

Winding paths and ramshackle mausoleums in the oldest "park cemetery" in London.