Just a man taking his prehistoric pet for a stroll.

One of America’s oldest and spookiest hotels, thanks to the residency of ghosts, dead presidents, and Alfred Hitchcock.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

This luxury hotel suite is located deep in the bowels of an old mine.

The location of the Bridge of Death and the Gorge of Eternal Peril in "Monty Python and the Holy Grail."

The perfectly named cave drop is the deepest in the continental United States, almost matching the height of Seattle’s Space Needle.

A creek tumbles over a series of step-like rocks to create this scenic water feature.

Hidden in a grotto 26 feet below Nottingham's oldest hotel, this stylish subterranean drinking den is notoriously hard to find.

The remains of Crystal Palace Great Exhibition of 1851.

400-year-old garden, restored to beauty.

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

This park is home to a collection of important industrial and religious sites.

Following years of secrecy, the hidden history of a World War II site is being brought to light.

This 6th-century church honors St. Tudno, the patron saint of Llandudno.

This former military airfield's claim to fame came from a lucky accident during the Second World War.

This 19th-century island fort built to protect against an invasion by sea.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

A Neolithic burial tomb connected with a colorful array of legends.

Go deep down into the earth to experience the world of Welsh coal miners.

An abandoned quarrying village turned commune is now a hub for learning the Welsh language.

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

An amazing collection of curiosities hidden in a small Welsh village.

An unexpectedly extraterrestrial room in a former Victorian resort club.

The only medieval bridge in Britain with its defensive tower still in tact.