A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A musical instrument played by the sea.

Now harmless, this looming post struck fear into the heart of medieval troublemakers.

The medieval ferry service has been going strong since the 14th century.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

An ode to a soldier who came to town, fell in love, then began making his own sparkling wine.

Brass plaques embedded in pavement preserve the memories of those who lost their lives at the hands of Nazis during World War II.

The topiary maze at the Habsburg hunting lodge.

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

The Habsburgs' royal collections of art and wonders.

Baroque celebration of the end of the Great Plague of Vienna.

A peculiar samurai statue overlooks the center of Brno.

A cheeky architectural easter egg.

Europe's second largest ossuary wasn't discovered until 2001.

An army of sleeping knights sculpted by a self-taught local artist beautifully depict an old Czech legend.

This copy of the famous Prague Astronomical Clock is the result of one man's passion project.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

A sprawling Victorian farm that has been surrounded by a capital city is one of Canada's greatest treasures.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

This inexpensive lodging house was once a prison notorious for its inhumane practices.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

At the time of its completion, it was the tallest dam in the world.

The largest hot spring in the United States is, as the name suggests, a stunning show of natural color.

A beautiful geyser under environmental threat.