This abandoned church in central Lyon is missing its front stairs.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

Rome’s legendary peephole vista is also a former Crusader stronghold.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

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

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

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

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

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

Remnants of a 4th-century church with vivid medieval frescoes and ancient sarcophagi hide beneath this old basilica.

The mystic whose incorrupt corpse still attracts the faithful.

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

When this 400-year-old fountain fell into disrepair, officials covered the mess up with what looks like a giant soup tureen.

Breathtaking and huge 430 year old maps of Italy.

These spartan apartments are provided to clergymen visiting Vatican City.

Sky ships, planes, and portraits left as unique tokens of hope and thankfulness.

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.

The lost Latin words were reconstructed using the holes from the nails that once pinned them in place.

A Gothic cathedral created from volcanic rocks.

See what remains of a once grand ancient Roman circus.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.