A long, winding trek rewards you with a gorge so captivating it inspired a painting in the Tate.

A perilous medieval road leading right into the sea.

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

Ship-sized kinetic sculptural fantasy.

Although it appears ancient and mysterious, the quirky folly was actually built 200 years ago by an eccentric estate owner.

These lovely Turkish-styled baths were brought back to life after winning a reality show competition.

A meandering boardwalk across the bogland leads to a "stairway to heaven" with sublime views.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

Fantastically decorated underground chambers built in the 1760s.

On this wooded path, a stained-glass window creates a spellbinding forest cathedral.

The oldest continual pilgrimage site in Britain was supposedly created by a gruesome beheading.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

No one knows who created the statues or if they are arranged properly—let alone the artwork's real name.

A relic of Victorian grandeur hides beneath a busy South London road.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

This enchanting hill is home to fairy lore and a sinister local mystery.

A 4,500-year-old forest is slowly being revealed from beneath the sands of a Welsh beach.

Legend says this cave housed a 16th-century cannibal and his family of 48.

These stark white cliffs were spat up by the sea and are slowly being retaken by it.

Scotland's only funicular railway is also the United Kingdom's highest.

Harry Potter once visited this massive limestone cliff, which was carved by an ancient glacial river.

This secluded walkway overlooks a magnificently wild London green space.

Legend says a witch conjured the world's third largest whirlpool to protect Scotland from a nasty pirate.

A open air theatre built on a cliff by an eccentric British woman.