This colossal war machine is now a living museum dedicated to underwater warfare.

This Polish cave has housed a dragon, a brothel, and an enduring legend.

Krakow's own version of the Hollywood Walk of Fame.

A memorial to the beloved brown bear that served in the Polish army during World War II.

Extremely famous in his native country, this Cracovian painter is all but unknown beyond Polish borders.

St. Mary's features one of the most spectacularly decorated cathedral interiors in all of Europe.

Remnants from a time before electricity.

Beneath Kraków Old Town's main square lies a hologram-filled medieval market vampire graveyard wonderland.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

What looks like a suicide in progress is actually a statue of Sigmund Freud.

The Renaissance-era courthouse is a relic from the fortified town's centuries of Venetian rule.

This narrow fjord-like bay is the largest ria in the Mediterranean Sea.

One of the best-preserved Roman amphitheaters is still used today, but for less brutal events.

Tiny castle in the middle of the Rhine made you pay to pass.

Legendary site where an evil bishop was devoured by rodents.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

The original toys that inspired the beloved children's stories are on display at the New York Public Library.

This skewed English house has looked like it's going to fall over for centuries.

Next to the Leaning Tower of Pisa is a cemetery home to ancient sarcophagi and disturbing murals.

Local stories say that if you drink from this well, you will return to Olympia.