This macabre monument atop an ancient well gives a nod to a brutal episode in Scottish clan history.

19th century museum with an eclectic mix of curiosities, from Egyptian artifacts to items on archery history to the skull of the world's oldest horse.

A perilous medieval road leading right into the sea.

This single-track road rewards brave drivers with stunning Scottish scenery.

A fernery hidden by neglect is uncovered, and an ancient specimen along with it.

A museum wholly devoted to juvenescence.

An engineering error ensured this cavernous 350-foot-long subterranean thoroughfare was never used as intended.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

A musical composition 1000 years in length plays at the Trinity Buoy Wharf in London.

A house of bones — but nobody is quite sure to whom they belong.

Charles Babbage's proto-computer, painstakingly brought to life.

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

This modern labyrinth lies in the shadow of a ruined medieval castle.

Fascinating town where normal life interfaces with the occult.

It is said the legendary wizard once lived in this sea cave beneath Tintagel Castle.

A local tree surgeon has created a whimsical walk full of carved tree stumps near Scotland's Loch Lomond.

The John Snow Memorial marks the epicenter of London's 1854 cholera epidemic.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

The heads of two giant mythological water horses honor Scotland's horselord past.

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

The largest greenhouse in the world is home to over one million types of plants.

A 18th century graveyard and its astonishing cortege of macabre iconography.

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.