This hidden Art Nouveau courtyard is an opulent feast for the eyes.

A large replica of a monumental Roman inscription is located on the side of this museum.

This large, circular tomb is the final resting place of the first emperor of Rome.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

The remains of this 2nd-century Roman temple are incorporated into a modern building.

A master of trompe-l'oeil creates a stunning, tourist-fooling dome out of a flat ceiling.

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

An underground city of salt.

Down this Cracovian street resides a plaque with a stark message about the city's air pollution.

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.

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

The abandoned remains of a once popular zoo, and the grave of the last known Tasmanian Tiger.

The world's only full-size replica of the research hut used by Douglas Mawson for his 1911-14 Australasian Antarctic Expedition.

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

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

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

A statue commemorating a Polish dog who took his role as man's best friend very seriously.

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.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

A memorial in the Tiergarten is a reminder of the suffering inflicted on homosexuals by the Nazi regime.

One of the world's heaviest musical instruments towers within a popular urban park.

A historic fire call point.