The signs of a long buried road can still be found hidden beneath a London sewer grate.

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

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

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

Rebuilt remains of a temple to Roman god Mithras.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

A tongue-in-cheek arcade where the games are based on everyday life.

A fantastic castle rumored to be the birthplace of King Arthur.

The curios of pharmacist and collector Henry Wellcome.

A student driver's nightmare.

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

Amazing and mysterious Neolithic settlement on Scotland's Orkney Islands.

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

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

One part local history, 99 parts gruesome haunted house.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

Banksy gives themself artistic license with this piece of London street art.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

360° views of the city plus five floors of optical illusions and hands-on science.

The longest hedge maze in the world.

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

The perfectly preserved underground rooms where Churchill plotted the war against Germany.

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A 30-acre garden inspired by the principles of modern physics.