The remains of an ancient Roman teenager are memorialized at the base of a modern London landmark.

The Great Fire of London and the regulation of one-way streets both started in this alley.

A beautiful ruin of a 14th-century Plantagenet castle built by a medieval mercenary.

In this quiet village, a blue plaque marks the spot where the famous fictional detective retired.

This Victorian footbridge over the River Tees was originally built to carry water from the high moorland to the industrial towns on the coast.

An ordinary lamppost situated in the middle of Cambridge has an unusual moniker and history.

This short bridge is the only thing connecting a tiny Irish island to the mainland.

The last Victorian market in Belfast.

The storied English village that pretended to be insane inspired NYC's nickname and the fictional namesake in the DC Comics universe.

A Victorian Gothic masterpiece housing a world-class collection of rare books and manuscripts.

This stained-glass window in an English church bears the coat of arms of George Washington's family.

When the plague struck York, this stone was used to leave supplies for the sick.

The final resting place of England's most notorious bandit.

This charming cobbled backstreet is the most Instagramable street in Paris, much to the residents' annoyance.

In the ruins of Glastonbury Abbey lies the alleged resting place of the legendary king.

Fascinating town where normal life interfaces with the occult.

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

One of the shortest streets in York has an especially odd name.

An incredibly well-preserved piece of ninth-century Viking poop.

The little-known second castle that William the Conqueror built in York.

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

This mysterious and unique painting is filled with symbolism.

On a wall in linear London, a plaque hangs at the high water mark of one of the worst floods in fictional Kcymaerxthaereal times.

Colorful murals by Jean Cocteau hide within this peaceful London sanctuary.