These lush botanical gardens employ the most purrfect pest control force.

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

The handiwork of a underdog clockmaker who solved an impossible problem for an Empire, and forever revolutionized seafaring.

These official units of measurement—including chains and perches—lie hidden beneath tourists' feet in a popular London hub.

Public access to clean drinking water was an instant hit among the masses.

London's smallest police station is barely the size of a phone booth.

One of the few remaining casualties of the London Blitz, this destroyed church has become an enchanting public garden.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Touching this 18th-century Scottish philosopher’s toe allegedly conjures good fortune.

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

Overlooked by many, the two famous Scottish warriors guard the main gate of Edinburgh Castle.

The final resting place of soldiers' loyal canine companions.

Ruined 11th century abbey built by King David I in Edinburgh, Scotland.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This 16th-century house tells the city's history through old artifacts and quirky tales.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

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

A mysterious shape catches the eye in this 16th-century painting.

The "beautiful" equation predicting the movement of all electromagnetic particles is engraved in front of Newton's tomb.

This pump on the bad side of Victorian London betrayed a horrifying revelation about the water supply.

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

Created by one of England's most prolific labyrinth designers, inspired by Bath city history.

The Cambridge pub where Francis Crick announced that he and James Watson had discovered the DNA double-helix.

Numberless clock creates a meal of time for the dreaded, insectile Chronophage.