A scenic UNESCO site that doubles as a habitat for various forms of wildlife.

An unfinished Serbian Orthodox church with 1,389 golden crosses planned to represent the Battle of Kosovo.

This monument is a stark reminder of the horrors of the Zanzibar slave trade.

This mysterious tower is said to enshrine a dormant seven-headed serpent that once protected Vientiane from destruction.

Perhaps the only one of its kind, the nearly-forgotten site once held mortal (and rigged) gladiatorial games between tigers and imperial war elephants.

A monastery considered a state-protected cultural monument of exceptional importance, founded in the 14th century by Serbian King Stefan Dečanski.

A UNESCO-protected spiritual seat of the Old Serbian Kingdom and Empire.

One of the largest sculpture collections in the U.K. features history's greats, from Bob Dylan to Galileo, in bronze.

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

The remains of an ancient Roman city are hidden underneath Bologna's beautiful public library.

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

Stuck in the arcade of Casa Isolani are three arrows of mysterious origins.

An extraordinary collection of 18th century anatomical waxworks.

Secret refuge and museum of the Duke of Florence.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

The oldest operating pharmacy in the world features 800-year-old recipes.

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

Drink wine handed out through a window as part of an age-old tradition.

This building features dozens of faces along its facade, although one is a bit chilling.

A striking memorial recalls thousands of Bolognese men and women killed fighting fascists in World War II.

A large statue of Pope Gregory XIII in Bologna was disguised as Saint Petronius to avoid destruction.