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

Art and armour fill every inch of this rich kid's Italian villa.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Secret refuge and museum of the Duke of Florence.

A striking symbol of the Bulgarian capital.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.

This cubist Vienna church building looks like some sort of alien stonehenge.

Built to give thanks for the passing of a plague epidemic, this cathedral is a one-of-a-kind architectural hybrid.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

The resting place for anonymous victims of the Danube's dark waters.

A tropical paradise just a short trip from the opera house is filled with beautiful winged creatures.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

Pompeii's less famous neighbor is still revealing her secrets.

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

A small window on Via Piella offers a lovely and rare peek at Bologna's lost canals.

In the world's oldest university is a stunning 17th century anatomical theater carved from spruce.

Though they've since been renamed, these two streets hint at Dublin's darker days.

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

Sweden's "good old days" painstakingly re-created in a model village.

A hidden bathhouse in one of Stockholm's oldest and busiest neighborhoods is open to anyone who can find it.

Stockholm's decidedly unique public transit system has doubled as the world's longest art gallery for decades.