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

Water and windows define this defensive Italian well.

Overlooked amid the tourist bustle of Florence, this museum is dedicated to the craft of stone inlay.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

A sulfuric hellscape in southern Italy.

Southern Italy's spinning top village.

A dismembered holy head stares out from her beautiful reliquary at the St. Dominic Basilica.

100 year tradition of fist fights, marked by marble footsteps.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

Secret refuge and museum of the Duke of Florence.

This private skyway is filled with art and was expanded explicitly so that Hitler could appreciate a river.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

An Italian hillside ghost town.

The middle finger of modernity.

Architectureal fantasy quarter of Rome.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

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

An alchemist's "magic door" stands in the middle of a Roman park.

A Byzantine-era church hidden in a wooded area below the Acropolis.

This small chapel holds the mummified heart of one of the heroes of the Greek Revolution.

1,500 Commonwealth servicemen of World War II are buried or commemorated in this cemetery.

A Byzantine church containing the holy remnants of three saints sits atop the site of an ancient temple.

Time stands still at this serene burial ground in the center of Budapest.

This statue of a falling man commemorates a teenage martyr of the Hungarian Revolution.