A tiny, heartwarming piece of art hiding in plain sight.

The Bristol Camera Obscura housed in an ancient windmill.

This trio of neolithic stone monuments are fabled to be a king and his knights that were petrified by a witch.

Perhaps the only prehistoric monument with its very own public bus stop.

Artists have long been drawn to these atmospheric 12th-century ruins.

Astonishing rock formations dot the Brimham Moor landscape.

The ancestral home of beloved English poet Lord Byron has a bizarre history.

This oak sculpture at the edge of a small woodland is nine feet tall and shrouded in mystery.

The nearly 200-year-old folly has a secret spiral staircase hidden in one of its pillars.

Much of what constituted mid-century Liverpool now litters a beach outside of town.

The biggest and deepest Cold War bunker open to the public can be found in southeast England.

Grotto replete with mystical designs laid out in glued shell mosaics.

A sturdy relic of Britain's once crucial gunpowder industry is now a haunting Cornish ruin.

A 550-square-meter micro-nation off the coast of Britain.

This beautiful example of Victorian engineering is the oldest water-balanced funicular anywhere in the world.

Seat of the Duke and Duchess of Devonshire for centuries.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

The Art Deco artwork depicts gilded carriers of deadly illnesses.

This ruined 15th-century hermitage is steeped in myth and mystery.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

Legend says these rocks used to be hunting dogs, a story that may have inspired Sherlock Holmes' most famous case.

The largest known medieval map of the world.

This ornate English estates "Prodigy House" still bears the cannonball marks of civil war.