The site of an early Arthurian battle and the dwelling-place of prehistoric people and (possibly) an ancient race of giants.

A bronze tribute to the wildly popular video game from the '90s.

These rose marble urinals are the most luxurious loos in Liverpool.

A network of concealed passageways lies within a busy London Underground station.

The "Bridge Over the Atlantic" lets you cross the waterway in mere seconds.

Monty Python fans will recognize this abandoned mine as the Cave of the Killer Rabbit of Caerbannog.

A strange rock with a sinister reputation lurks within the crimson waters of this Scottish glen.

Human-made caves excavated to hide a secret society of wealthy pagans.

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

Science fiction's grandfather has a fittingly marvelous tomb.

The last working windmill in the U.K. that has eight sails.

This little-known hero has been protecting "The Fens" for close to 400 years, and now from its most powerful challenger yet: climate change.

There are plenty of wonderful panoramic vistas in Edinburgh, but not many are hidden smack in the middle of the Old Town.

These ancient symbols freckling a Scottish cliff remained hidden for centuries.

These semi-natural waterfalls hint at the park's Victorian-era industrial past.

This mountain is one of the largest in Scotland but is better known for its hollow insides.

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

A close look reveals that the Scottish monument is just slightly off-kilter.

Now famous as the "Harry Potter bridge," this impressive concrete viaduct has long been an icon in its own right.

Though difficult to access, this stunning cave has a place in Scotland's poetic history.

The sign announces the Scottish village's cosmic connections, as it's twinned with Glenelg, Mars.

The remnants of a classic 1970's British film.

Modern megaliths form this work of cosmic, Celtic landscape art.

This abandoned bridge over the River Irvine may be the oldest surviving railway viaduct in the world.