London's marvelous wildfowl reserve along the Thames.

This delightful little museum is dedicated to only one thing: pasta.

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

A rare example of a medieval house in Rome adorned with a melancholic inscription.

Hidden within this iconic mountain are a set of World War II bunkers once used by German forces.

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

Stone memorial that's said to predict the death of the pope and the site of the Cadaver Synod.

St. Francesca Romana, patron saint of drivers, resides in the church she founded.

Roman-era ships unearthed...

Ancient ruins hidden underneath a modern luxury hotel.

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

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

Architectural monsters are devouring this palace's every door and window.

Before the more famous Royal Palace of Caserta, the king of Naples first commissioned this overlooked residence.

A vast necropolis where you'll find the elaborate mausoleums of Argentinian tango stars.

A tower devoted to — and modeled after — the Divine Comedy.

This historic, palatial theater is now one of the world’s most beautiful bookstores.