One of the tallest buildings in Iceland, and perhaps, the most visually impressive.

Three underground crypts and a pointed arch under the bell tower make this cathedral unique among Romanesque churches.

This Renaissance palace features a unique architectural design and is now home to the Ferrara National Art Gallery.

This Roman theater was crafted into the local tuff rock and was rediscovered during the 19th-century.

One of the four sanctuaries of Rieti's Holy Valley was the site of the first living nativity scene.

This medieval church in Rome was almost destroyed following a terrorist attack in 1993.

One of the earliest depictions of an Arthurian scene that is shrouded in mystery.

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

Fountain where visitors can earn a license to be mad.

According to local folklore, this Roman sepulcher was once a throne for the Devil.

Water and windows define this defensive Italian well.

A magnificent Neogothic tomb hides within this Italian fairytale-like forest.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

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

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

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

The remains of a town so thoroughly destroyed by French forces that the citizens simply left.

The best preserved Paleochristian basilica in Rome hides a number of oddities and secrets.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

A 16th-century horror show built in a lovely Italian garden.

This room of wonder is full of relics, from knights in armor to rare works of art.