One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

Spitalfields' regal market goat is said to be a monument to the area's migrant population but most are pretty sure it's just a goat.

Museum dedicated to the UK's first charity for abandoned children, with keepsakes of the mothers who left them behind.

The Tudor-style cottage in the middle of the square is not quite what it seems.

Remnants of the 16th-century defensive wall still stand unassumingly within Edinburgh.

An architectural oddity hides in plain sight on this iconic London bridge.

The sculpture is made of more than 100,000 knives collected to raise awareness about violence.

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

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

Originally built for London’s cab drivers, this bright green hut now serves anyone a hot drink or meal.

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

This one has sailed five times as far as Sir Francis Drake's famous ship.

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

The most loyal of little dogs, or a Victorian era publicity stunt?

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

Protecting the dead from opportunistic body snatchers.

The ritual has been performed uninterrupted for nearly 700 years.

The final resting place of soldiers' loyal canine companions.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

England's oldest surviving hedge maze has been confusing visitors for over 300 years.

Now home to a drinking establishment, this building has a macabre history.

Never actually a tree at all, this spot was the site of London's public hangings for nearly 600 years.

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.