A church filled with the bones of hundreds of virgins martyrs—or so they say.

An ancient necropolis of magnificent tombs.

The ancient mosaics here are considered among the finest in the world, and serve as a stunning record of Greco-Roman daily life.

A detailed pachyderm supports Rome's smallest Egyptian obelisk.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

The marble facade hides a little-known medical museum with early surgical instruments and rare copies of canonical texts.

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.

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

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

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

This strange bovine gargoyle is said to have been put in as a passive aggressive form of revenge.

A medieval weapon rumored to have been used by the brilliant poet himself.

The middle finger of modernity.

Explore the quarry where the marble was sourced for Michaelangelo's David.

Old batteries and frog skeletons reside in this lakeside monument to Alessandro Volta.

The beautiful, ornate weather station is the most popular geocache in Salzburg.

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

Located in an old church, this brewery produces a different kind of holy water.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

This legendary dessert was served to Nobel laureates for decades.

The library's graceful rotunda is like a bibliophile's temple.