This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

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

This basilica is dedicated to two saints, one of which is known more for his famous quote.

This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

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

Charles Dickens was not a fan of the ghastly wall dressings in this 6th century church.

A lavish 16th-century mansion filled with spectacular staircases, fantastic frescoes, and gorgeous gardens.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

Italian director Pier Paolo Pasolini fell in love with this lonely 13th-century tower while making his most famous film.

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

The first botanical garden, a feather in the cap of the Grand Duke of Tuscany.

Knights Templar are visible inside this stunning Cistercian abbey.

One man's exploration of the human form, including the bizarre and delightful "Man Attacked by Babies."

The painter of "The Scream" is laid to rest under a stoic bust of himself in the humble corner of an Oslo cemetery.

In downtown Oslo, a menacing and terrifying relief clings to a church wall.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

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

Its interior is adorned with some of the best examples of early Christian mosaics.

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

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

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

This former papal residence was the site of an infamous incident known as the “slap of Anagni.”

A medieval house with mysterious alchemical inscriptions on its facade

This statue has a painful history, but activists have since recontextualized it as a way to educate visitors about the dangers posed by fascist regimes.