Also known as Rye Castle, this 13th-century fortification later became a prison and held one of Rye's most famous criminals.

An ancient water supply dating back almost 500 years can still be found standing in East Sussex.

This centuries-old hotel hides a network of secret cellars and passages once used by smugglers.

A house of bones — but nobody is quite sure to whom they belong.

Ancient human remains unearthed around the iconic monument.

Famously misunderstood wonder of the ancient world

This gate served as a small lock-up jail in the 14th century.

The oldest working mechanical clock in the world.

The television series' iconic giant foot was borrowed from this classical painting.

Its interior is adorned with some of the best examples of early Christian mosaics.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

A Nesting Doll of Churches.

This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

A deep mark on the remains of a Roman temple, believed to be left by a legendary warrior.

A sculpture serving as an homage to Pope John Paul II.

This ancient market is often referred to as the oldest shopping mall in the world.

This tree was grafted from the actual tree that led Isaac Newton to ponder the theory of gravity.

Breathtaking and huge 430 year old maps of Italy.

A treasure trove of astronomical, mathematical, and scientific instruments at Cambridge University.

This sculpture encompasses the emotion of rail travel.

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