One of the most well-preserved castles in Italy also contains a rare medieval example of a port fortification.

On the shores of Lake Garda, the ruins of a Roman villa that allegedly belonged to the poet Catullus.

A small island in Lake Garda that was used as a burial site, pirate hideout, and a monastery.

Angels and demons watch over newspapers in this deconsecrated church.

It's believed that the dead were once taken out of houses through these now walled-up doors.

Beautifully decorated tarot cards from the Middle Ages.

A network of underground water channels that dates back to the Middle Ages.

The eclectic observatory castle of a 19th-century astronomer and explorer.

This tiny river island switches sovereignty every six months as part of a rare, centuries-old agreement.

Get a close-up look at a 16th-century Basque whaling ship at this factory and museum.

This lesser-known leaning tower is all that remains of the medieval castle of Vernazzano.

A massive sculpture of an obscure Celtic coin that has become a symbol in Slovakia.

Belgium’s famous peeing statue has worn many hats (and coats, and pants), which are on display at this small museum.

Climb inside an iron crystal magnified 165 billion times its normal size.

A huge old mansion full of thousands of toys, each there to be used and played with.

Head underground and take a tour of the city's working sewer system, and see the underground river Senne, which defined Brussels for centuries before being covered in the 19th century.

Nature is slowly overtaking this disused cemetery on the outskirts of Brussels.

Drink among marionettes at this pub inside a historic puppet theater.

The Belgian royal family's private depot now stands abandoned and forgotten alongside the tracks.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

This Greek temple, open only an hour a day, was the site of a war of tastes between an architect and an artist.

One of the deepest indoor swimming pools in the world.

This recently restored crypt was once plagued by liquefying coffins and exploding caskets.

This modern arts center is built around a gem of late-Baroque architecture.