Regency-era excess on the English Coast.

Summer in Scotland begins with a spectacularly wild and colorful event rooted in ancient pagan traditions.

These haunting ruins belong to an ancient village that once had one hell of a view.

A Roman spa buried deep beneath the City of London.

One of the world's oldest trees comes with a Welsh legend intertwining it with a spirit prophesying death.

Deep in the countryside lie the remains of one of the grandest Roman dwellings in Britain.

Built by the patron saint of illusionists this Elizabethan manor house is riddled with secret cubbies for hiding priests.

Early Medieval stones sit on display at the beautiful Govan Old Church in Glasgow.

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

One family's environment-friendly hobbit-house in Wales.

Man-made cave with enigmatic carvings, some say made by the Knights Templar themselves.

Enter the world under the hill at this ancient UK burial chamber.

This century-old grotesque has a mysterious history and may not actually be a rabbit.

Near Birmingham, England three and a half miles of top-secret tunnels housed a World War II “shadow factory” and a Cold War nuclear bunker.

A little slice of Japan and its aesthetics in London's Holland Park.

A midnight snack that lights up the night.

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

Cliffs full of fossils at the portal to England's Jurassic Coast.

You'd never know the houses at 23-24 Leinster Gardens were fakes—until you see the train tracks on the other side.

During this Shetland Islands celebration, hundreds of torch-carrying "guizers" lead a procession to burn a viking longboat.

The largest oak in England is said to have been the hideout of Robin Hood and his Merry Men.

One of Europe's oldest libraries.

An English artist has turned an unassuming ex-council house into a time-lost house of mystery.

The ruins of an 11th-century Norman castle with a rare, perfectly circular shape.