A mysterious chasm in the heart of the ancient Roman Forum, the Lacus Curtius was once believed to be a gateway to hell.

An ancient Roman temple first dedicated to an emperor's wife is now a church.

This curious, round temple is the oldest still-standing marble building in Rome.

This tree is a living witness to the beginning of the Civil Rights Movement.

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

Railroad officials in the early 1900s sought to spare travelers the sight of Roman soldiers’ private parts.

Chelsea's soldiers were given strict orders when crossing this historic bridge.

A massive marble foot is tucked away in a small alley near the Pantheon.

This statue is the only female representation of Rome's "talking statues."

Look closely and you’ll notice that the color changes a third of the way up the tower.

This general store is more than a century old and home to various oddities and antiques.

Time travel with sweets across history at this research-based candy store.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

A sad reminder of the World War II bombing stands largely unnoticed on a street corner.

A famed artist's inspiring work of peace and tolerance.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

Straight out of a nightmare, barcode-faced babies climb up and down Prague's television tower.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

The ruins of the largest gladiatorial school in Rome are largely hidden under modern streets.

Thomas Jefferson's estate is home to hundreds of varieties of historic fruits and vegetables.

A statue dedicated to the antihero of the Nibelung legend.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

This 14th-century temple is also known as the "Temple of the Golden Pavilion" for its gorgeous gilded reliquary hall.