Britain's answer to the NSA is based out of this deliciously-named circular headquarters.

Some of England's last cave dwellers lived and worked within this huge cave.

The centuries-old obelisk may have inspired J. R. R. Tolkien.

Locals call it the "Give Peas a Chance" bridge because of its distinct graffiti.

The biologist's fossilized headstone was meant to reflect his love of nature. Its, ahem, unusual shape is probably just a coincidence.

Centuries of human activity have forged an eerie landscape of ruins and craters on an exposed and windswept hilltop.

The medieval-looking hammer beam teak roof may be a Victorian vanity, but it's still absolutely magnificent.

This unlikely memorial honors the Canadian and Portuguese laborers who felled trees for the Allies in World War I.

This craggy boulder is fabled to be either a druidic relic or Satan's stumbling block.

An octagonal folly tower overlooking the sea.

The world's only managed flock of mute swans was established as a factory for monk meat but is now an adorable sanctuary.

A dark Victorian well house now plays host to mystical waters and pagan shrines.

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

Manchester's abandoned train depot lingers in a post-industrial purgatory.

London's only public statue of the much-married monarch adorns the gate to St Bartholomew’s Hospital.

One English town's celebratory landmark spurred more trouble than anticipated.

A sculpture outside London's oldest cathedral honors the Mohegan chief who died while petitioning the king.

Historical etchings such as “Miserable, wild, distracted 1350" and “The Archdeacon is an ass.”

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

Left by the Devil, an ancient quarry or just plain old erosion, this enigmatic rock pillar rises 28 feet from the hillside.

The sculptural remains of the last home of a legendary Dada artist.

This 2,700-year-old woman is the jewel of the Maidstone Museum's Egyptian collection.

An engraved stone in a village church claims to be the grave of a minuscule folk legend.