The remains of Crystal Palace Great Exhibition of 1851.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.

The site of London's first coffee house has been serving refreshments of one kind or another for 360 years.

The anatomical-pathological collection of a man who changed surgery.

In this cobwebbed old operating theater, you can practically hear the screams of the unanesthetized patients.

Wedged between two buildings at the Great Ormond Street Hospital is this secret music installation.

Catacombs turned marketplace.

A hands-off space for graffiti artists to hone and display their skills.

A kaleidoscopic warehouse-maze of handmade neon signs.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

You can crawl inside this atmospheric 5,000-year-old tomb.

Below a historic English market town lies a secret underground city complete with kitchens, laundries, storerooms, and an underground lake.

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

This historic Benedictine monastery brews a booze so toxic that it has often been blamed almost singularly for Scottish hooliganism.

Legend says this little-known stone circle is formed from people petrified as punishment for dancing on the Sabbath.

This lovely ancestral home inspired the author D.H. Lawrence, and features a tunnel made out of a living willow.

This mysterious hilltop collection of Druid carvings isn't quite what it seems.

A 2,000-ton rock resting in a state of a delicate balance.

The final resting place of one of the most influential modern occultists.

The Bristol Camera Obscura housed in an ancient windmill.

A unique journey back in time to an early 20th-century fairground.

Isaac Newton's former home, where the famous apple tree still stands.

Britain’s highest medieval monastery is a remote ruin nestled at the head of a valley 1,240 feet above the sea.

The mysterious, fantastical woodland inspiration for "The Lord of the Rings."