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

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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.

What appears to be an ancient Roman temple is actually a Catholic church.

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

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

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

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

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

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

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

Breathtaking and huge 430 year old maps of Italy.

The first statue to be added to Saint Peter's Square in over 350 years is an ode to migrants and refugees around the world.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

These spartan apartments are provided to clergymen visiting Vatican City.

Sometimes called the Banksy of Madrid, Muelle was a pioneer of street art in the Spanish city.

Kingly French toast comes soaked in milk or red wine, then drizzled in a citrus-perfumed syrup.

The best collection of Mudéjar building replicas gathered in a theme park in Olmedo.

Since 1768, the pillar at Guildhall Market in Bath has been a hub of economic transactions.

Along the pavement of this neighborhood in Madrid are quotes from famous authors.

After the queen of Spain had a dream where these statues fell and crushed her, they were removed from the palace and given new homes around Madrid.

This open-air sculpture museum is located under a bridge in the center of Madrid.

Once a resting spot for King Fernando VII.