After the famous composer died in Paris, his sister snuck his heart out of the country to honor his wish that it be buried in their native country.

Communism's topsy-turvy effect on Poland has been brought to life in this wacky tourist trap.

A hidden art gallery in an abandoned Warsaw fort.

This 700-year-old structure is one of the most unique architectural and historic monuments in Gdańsk.

Warsaw's fantastically preserved gasworks...almost.

This Nazi ruin was the site where Hitler was almost blown up by a suitcase bomb.

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

The site of the first battle of World War II.

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

The walls and ceiling of this Polish church are decorated with thousands of skulls, with another 21,000 skeletons just below.

This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

Sail in for a ’dam good slice.

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

A whale rib was used to advertise the store by the arch that offered exotic goods from far away.

Memorials at a Florence railway station remember the citizens who were deported from Italy and sent to extermination camps.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

An incredible menagerie of more than 3 million taxidermied animals at the oldest science museum in Europe.

The largest and most famous wax anatomical collection anywhere in the world.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

The middle finger of modernity.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.