This water-powered cliffside railway is one of the steepest funiculars in the world.

A hidden tunnel leads to an abandoned slate quarry that's now a secret swimming spot guarded by cliffs.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

This former Welsh metal factory is now a lovely abandoned relic but was once one of the industry's world leaders.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

A Welsh sheep farm provides daily (non-sheep) meals to red kites, producing dazzling displays of aerial acrobatics.

A group of glacial erratic boulders are improbably balanced on white limestone pedestals.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

The names Lúthien and Beren can be found inscribed on the shared grave of the famous writer and his beloved wife and muse.

The medieval legend behind this holy well was one of the inspirations behind "Alice's Adventures in Wonderland."

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

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

A labyrinthine underworld of tunnels and caverns hides beneath the city.

An intriguing three-sided folly is a testament to one man's devotion to Catholicism and the number three.

It's believed a local adventurer spent 50 years living inside this cave.

A 2,000-ton rock resting in a state of a delicate balance.

On this small spit of land, the person who runs the public house is considered the King of Piel Island.

These legendary stone steps were once used to haul coffins up the rockface.

A kaleidoscopic warehouse-maze of handmade neon signs.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."

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

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

A misunderstanding gave this 18th-century racehorse a most amusing name.

A Romanesque tower appears when water levels drop.