One of the largest caves in the world open to the public.

During World War II, this rice mill became a Nazi concentration camp.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

Pilgrimage site for star-crossed lovers.

This Italian church is as beautiful as it is common, except for the real skulls decorating the many mannequins inside.

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

An extraordinary collection of 18th century anatomical waxworks.

This zoological museum began as the first great curiosity cabinet.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

A gorgeous medieval library where the books are kept in chains.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.