The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

This mundane post marks the old location of the city's main postal hub.

This was once a hall in which a 16th-century royal banquet was hosted by King James VI of Scotland.

Overlooking the burial ground is a tower designed to prevent thieves from snatching the recently deceased.

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

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

A 18th century graveyard and its astonishing cortege of macabre iconography.

17th century streets hidden under Edinburgh were once a breeding ground for the black death.

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

Carved initials which are nearly 500 years old preserve the deposed Queen's presence at Hampton Court Palace.

The world's largest grapevine has produced a delicious harvest at Hampton Court Palace for almost 250 years.

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

Giant, friendly pelicans in Central London, the most unlikely of places.

A network of bells in the pubs and restaurants around Westminster alerts politicians when it's time to cast their votes.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

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

After nearly 60 years, there's still a bear at Paddington Station looking for help.

Black cat statues guard this temple-like Egyptian revival factory.

The library houses an incredible collection of some of the world's most impressive books and manuscripts.

A quiet, semi-secret square with statues of Mahatma Gandhi, Virginia Woolf, and a conscientious objectors stone.

The largest of London's subterranean rivers and once a mad, bad center of London life.

A hidden treasure in London with a rich medieval history, and the resting place of many luminaries.

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

Ship-sized kinetic sculptural fantasy.