One of the few remaining examples of 19th-century London’s attempt to clean up its reputation.

The abandoned funicular tunnel was a secret base for the BBC during World War II.

A circle stone within a stone circle.

A century-old tradition has culminated in a small but singular collection of feline effigies.

Follow the original medieval paths that wind through this intriguing section of the city.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Possibly the oldest of Britain's ancient henges is also one of its most stark.

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

The most iconic structure in Scotland has been home to bishops, colonels, and Sean Connery characters.

A gorge full of caverns where early humans lived alongside cave hyenas, giant mammoths and wooly rhinoceroses.

On October 17, 1814, a 15-ft. wave of beer ran rampant through the streets of London.

These ruins are a hidden gem, complete with fantastic views over the cliff edge.

The wooden telephone box hidden away in London's Piccadilly was the original prototype of the iconic kiosk.

The oldest residential street in Europe also features an optical illusion.

This logic-defying 16th-century Tudor manor still stands to the delight and astonishment of onlookers.

This Viking gravestone carved in a rare runic style was dug up from a London churchyard.

Ancient Egyptian wigs, South American feather headdresses, a bounty of anthropological artifacts in Oxford.

These ancient sea caves hold Britain's highest concentration of Pictish rock carvings.

This Roman amphitheater is said to be King Arthur's legendary Round Table.

The barrel-made lookout from Shackleton's final ship is tucked away in the crypt of one of London's oldest churches.

There's a labyrinth of medieval chambers hidden deep below a 15th-century pub.

A statue of the legendary Celtic warrior queen who fought the Roman invaders stands in one of the cities she once destroyed.

This giant wooden treehouse within a sprawling garden has its own eatery.

The 2,000-year-old beam is tucked within the pedestrian entrance to the old London Bridge.