This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

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

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Believed to be the remains of the lost Temple of Minerva, this nymphaeum has been known by its misnomer to this day.

A freedman baker’s lavish tomb has a relief showing various stages of Roman bread making.

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

One of the largest squares in Europe contains an entire artificial island.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

The tomb of the mythological founder of Padua is not hidden in some obscure crypt, but stands right in the middle of the city square.

A twisted steel beam from the wreckage of the World Trade Center is the centerpiece of this memorial for those who died on September 11, 2001.

The people of Padua pledged to construct this church if the city was spared from destruction during World War I.

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

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

The entrance to this Frankfurt subway station looks like an old tram car crashed into the concrete sidewalk.

Hamburgers are intensely proud of their tunnel beneath the river.

This strategic isle was once swapped between empires and almost entirely destroyed in a bomb explosion.

Electricity pylon standing in the middle of a shelter.

Metro station with a claim to rock n' roll fame.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

The "Prussian Versailles" that is as glorious today as when it was built.

The most visited, and possibly most controversial, museum in Germany.

A slice of central Asia in the middle of Berlin.

Cold war icon and onetime "hole" in the iron curtain.