This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

Remnants of cells from the most notorious London prison may lie in the basement of a rare Victorian Gin Palace.

This 1920s Dutch barge is now a floating bookstore.

A book bound in the skin of an infamous criminal, along with countless other specimens.

The decaying ruins of Wales' first asylum for the mentally ill.

A modern English garden of eccentric beasts, follies, and oddities.

The elaborate clockwork contraptions in this Scottish gallery create small worlds of whimsy and horror.

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

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

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

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

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

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

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

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

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

A kaleidoscopic warehouse-maze of handmade neon signs.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

This strange moor has a song written about it, Bronze Age carvings, and an alien sighting.

The remains of the concrete ship can be seen during low tide.

WWII artifacts, including the building itself.