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

A large grotto built in the 16th century amidst Florence's famous Boboli gardens.

The middle finger of modernity.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

The skull of the patron saint of lovers lies in the Basilica di Santa Maria in Cosmedin—maybe.

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

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

Architectural monsters are devouring this palace's every door and window.

The final resting place of the poets Shelley and Keats.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

At the crypt of St. Mary of Eulogies and the Dead you are left alone to ponder mortality among piles of skulls.

The yawning maw of this pagan visage is said to bite off the hands of liars.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

Architectureal fantasy quarter of Rome.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

A 90-ton, gravity-defiant steam locomotive shoots for the skies in this bizarrely beautiful public artwork.

A collection of old neon signs from all over Poland line a secluded courtyard.

The silly symbol for an underground protest group is now scattered around the city.

In the summer, the area around this sculpture transforms into a vibrant concert venue.

This extensive collection covers thousands of years of Polish military history.

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

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