The purported midpoint in London from which all distances are measured has a tragic love story at its core

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

These wire animal sculptures commemorate the exotic inhabitants that once called the Tower of London home.

Graffiti from the 16th and 17th centuries cover the walls of this part of the Tower of London.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Tucked away in the Tower of London is the weapon once used to execute high-profile prisoners.

Inspired by the more famous Scrovegni Chapel, Cappella di San Giovanni contains several amazing frescoes.

Europe’s oldest natural human mummy.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

The oldest operating pharmacy in the world features 800-year-old recipes.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

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

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

This small church was constructed over the ruins of three temples dating to the Roman Republic.

A small cell adjacent to this church was once the bedroom for a renowned saint.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

This is the oldest Roman-made bridge in the city still existing in its original state.