A sinkhole and now a swimming hole, too, full of dazzling turquoise water.

Swarovski's museum/theme park is a fake diamond fantasia overlooked by a giant.

This collection of over 50 murals celebrates Brussels' rich history as the self-proclaimed home of the "comic strip."

Vienna's underworld of tunnels and subterranean rivers made an iconic appearance in a 1949 Orson Welles film.

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

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

This collection of solar timekeepers includes the world's first digital sundial.

The vast chamber inside this abandoned cooling tower looks like something out of a sci-fi dystopia.

Hidden along this old street in Antwerp is a surreal monument of a bronze arm sprouting four hands.

This heavily worn bas-relief was once an honored fertility symbol.

Walk or bike along a narrow strip of Belgium sandwiched by German territory.

This interactive sculpture allows visitors to leave a message in case a friend passes by.

This annual Belgian water race attracts bathtub captains from all over the world.

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

This old, abandoned hotel offers magnificent views.

The legendary giant's severed hand sits on Antwerp's popular shopping street.

This gruesome biblical parade celebrates the one day a year that a bit of Jesus' blood turns to liquid.

Petting this mysterious iron monkey supposedly brings good luck.

A giant bug impaled on a 75-foot-tall needle.

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.

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

This statue dedicated to the story of a Flemish boy and his dog was relatively obscure in Belgium, but a cult sensation in Japan.

The Belgian library displays burned books that were salvaged from the fires of both world wars.

This whimsical statue dumps water on its head to symbolize knowledge flowing into his brain. Or maybe booze.