Macabre astrological automaton clock dating to the late 1400s.

Inside this Krakow church, an explosion of psychedelic color.

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

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

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

This colorful and quirky set of pegasus sculptures celebrate the works of poet Zbigniew Herbert.

A statue honors the children who fought Nazis in Poland.

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

Catch a scenic view of Warsaw's Old Town from the top of a centuries-old dumping ground.

The last king of Poland was interred in this church nearly 200 years after his death.

This bell stars in a tragic love tale and is said to make wishes come true.

The Polish capital has had a deep connection to its guardian mermaid for almost a millennium now.

The final resting place of more than 200,000 people, this is one of the largest cemeteries in Europe.

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.

Small Easter eggs are hidden in the ventilation holes of the city's newest trains.

A Stockholm metro station is home to an escalator that is not only the longest in Sweden, but among the longest in the world.

Every Tuesday, students let off steam by screaming into the night air.

Although rarely used, there is still a hidden room for the royal family at the Stockholm central station.

One of the most breathtaking railways in Europe also takes one of the steepest climbs, from fjord to mountain plateau.

The design of this beautifully crafted building was inspired by Norwegian glaciers.

The world's oldest bookshop still in operation.

Historic fortifications form the boundary of Vatican City, but it’s not entirely surrounded by walls.

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

The Vatican's secret porn-festooned bathroom was painted in erotic murals by one of the greatest artists of the Renaissance.