A striking symbol of the Bulgarian capital.

The most famous location in China was home to whole dynasties worth of imperial rulers.

This gigantic monument hidden in the woods was built to thank the Dutch for sheltering Belgian refugees during World War I.

Colorful and chaotic stacked hotel in North Holland.

Water and windows define this defensive Italian well.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

An Italian ghost town that fought obscurity, until a mysterious illness brought it to its knees.

The studio built by fascists in the hopes of "reviving the film industry" with the occasional propaganda film opportunity thrown in.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

Jesus' footprints and the first catacombs in the world.

One of Catholicism's four major basilicas has a series of papal portraits that are said to predict the end of the world.

Gods clash with machines in a power plant regenerated as a museum.

2300-year-old Roman road connecting the empire.

This historic recreationist school churns out warriors that may very well have had a fighting chance in Rome's pits of the day.

A huge enchanting public park just outside the ancient walls of Rome.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

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

The Italian revolutionary's legendary wife is portrayed on horseback waving a gun and holding her child in this memorial on the Janiculum.

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

The final resting place of the poets Shelley and Keats.

Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

This curious, round temple is the oldest still-standing marble building in Rome.