This legendary stone is of unknown origin, and throughout history has been a literal touchstone for British leaders.

English antique dealers with a taste for the unusual.

The true age of this ancient stone circle is unknown, but its stunning vista isn't in question.

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

A collection of comics, graphic novels, animation and caricatures devoted to exploring this often overlooked art form.

London's old-school healing garden.

One of the world's largest collections of pathological specimens.

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

A metal tree emits eerie, melodic notes on top of Lancashire's Crown Point.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

A cluttered and astounding collection of antiquities and curiosities.

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

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

Surreal riveted sea forts once protected the Kent shores from German attack.

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

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

Rebuilt remains of a temple to Roman god Mithras.

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

A hands-off space for graffiti artists to hone and display their skills.

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

The atmospheric road was never meant to be so creepy.

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

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

This shop and gallery is a modern-day cabinet of curiosities, unassumingly positioned along an urban thoroughfare.