A tribute to the Polish insurgents who fought in the failed attempt to end their city's Nazi occupation.

Once a giant gingerbread factory, this space now hosts exhibits and workshops on the historic treat.

The former Nazi Germany concentration camp stands as a museum to remember this dark chapter in European history.

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

An underground city of salt.

A preserved oak tree about 3,500 years old found in Riga, Latvia.

Recently revamped museum of Fijian history located within a gorgeous colonial-era garden.

Poland's oldest surviving university building holds a wealth of historic science instruments including some used by Copernicus.

The medieval prince founded the first library in Ukraine at Saint Sophia's Cathedral where he was interred.

This trio of stone spires claims to be the only preserved medieval execution site in Europe.

Medical museum that houses most notably the taxidermied remains of Vladimir Demikhov's famous two-headed dog experiment.

3,000 market stands in five former Zeppelin hangars.

Ancient burial grounds of the wealthy.

The second oldest anatomical theater is housed in a museum of curiosities.

A man has revenged his true love's betrayal through tears and stone genitalia.

This giant crucifix is like U2's Joshua Tree for Swedish death metal fans.

River pirates, murderous bandits, and serial killers used this Illinois cave as their debauched hideout.

A once-booming Mississippi River town with a history of racial violence is now eerie and mostly abandoned.

The lowest point in the state of Illinois, at the confluence of the Mississippi and Ohio rivers.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

A portly statue of a golden boy commemorates an unusual cause of the Great Fire of London: the sin of gluttony.

London's last remaining public soapbox site has seen speeches from Karl Marx, Vladmir Lenin, and George Orwell.

An small and easily overlooked archaeology museum chock full of Egyptian artifacts.

Eighty million natural history specimens call this gargantuan museum home.