Ruins from the Parthenon and petrified wood line the interior of one of the world's most famous monuments.

Lines on the pillar of Heidelberg's Karl-Theodor Bridge record the dramatic heights of past floods.

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

A bronze and stone statue made to recognize the life and career of a Russian aristocrat turned English rugby player.

Since 1768, the pillar at Guildhall Market in Bath has been a hub of economic transactions.

At the center of London’s oldest roundabout stands an obelisk that was erected in 1771, but spent several decades elsewhere.

A replica of the famed statue far from home.

All unmarked mute swans on the Thames are owned by the Queen per a tradition that began in the 12th century.

A commemorative plaque at the door pays tribute to an "American Patriot" known for his betrayal.

A half-mile-long stretch of medieval forts built after a devastating pirate attack persists amid the modern port city.

The lantern carried by the infamous Guy Fawkes when he was arrested while attempting to blow the houses of Parliament and the King of England to smithereens

Outside of one of Britain's most renowned social clubs, a step installed specifically for the Duke.

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

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

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

Recently restored menagerie of Victorian-era beasts.

Only a few pieces remain of the structure that carried people and goods across the Thames for some 600 years.

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

A medieval replica of King Arthur's legendary table, the Round Table hanging in Winchester Castle was decorated by Henry VIII.

This Welsh village gave itself a ridiculous name in a publicity stunt a century ahead of its time.

The fences outside some of South London's estates are made from recycled World War II stretchers.

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

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.