The geographical center of Budapest is marked with a 10-foot-tall stylized zero.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

A statue in Budapest's Liberty Square honors the former U.S. president's efforts to end the Cold War.

Britain's only herd of free-ranging reindeer.

A six-ton wedding present for the King of the Scots.

The fountain marks the area where hundreds of accused witches were burned at the stake.

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

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

The Metropolitan Police refurbished the blue box (perhaps not coincidentally) the same year "Doctor Who" returned to TV screens.

The Guinness Record holder for largest hedge in the world is a verdant Scottish bulwark.

In 1396, two Scottish clans that had been violently feuding for centuries finally faced off in a bloody battle in this park.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.

This striking steel sculpture transforms environmental data into art.

Where the rules of that most quintessentially English game were first devised by an eccentric inventor.

This eye-catching roundabout sculpture commemorates one of England's best World War II-era "shadow factories."

This English medieval castle is where King John died of dysentery.

The bizarre headgear looks like it was made for a fool, not a king.

Ancient human remains unearthed around the iconic monument.

The castle still holds traces of the abandoned Roman fort it was built atop.

The first archaeological site discovered by aerial photography.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.

With lush plants and flowers, huge trees, ponds, and hidden monuments, this place feels a bit like discovering Narnia.

Don't be fooled by this fake medieval facade even if it is almost 300 years old.

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