Half-sized replica of the Leaning Tower of Pisa built to honor Galileo.

This surprising gem is a world-class archeological museum hidden at the University of Chicago.

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

Inside this McDonald's you can dine on your Big Mac and fries next to a 2,500-year-old Roman wall.

Legend has it that this bronze orb, which sat atop an ancient Egyptian obelisk, once held the ashes of Julius Caesar.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

The only museum with its curator—and her pets—buried inside.

Built to repay the sins of the father, this church is home to one of the most valuable works of Western art.

Water and windows define this defensive Italian well.

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

An extensive collection of reliquaries containing the bones of saints housed in the largest Catholic church in Venice.

Thousand-year-old Viking runes adorn an ancient Greek lion at the entrance to the Venetian Arsenal.

Those who own or stay at this 500-year-old, allegedly cursed house often meet terrible fates.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

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

Early prototype for Frank Lloyd Wright's Guggenheim.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

Relics of the 1894 Midwinter Exposition continue to delight visitors today.

Residents of Fremont in Seattle have considered it the center of the universe since the 1970s.

The narrowest street in Paris.

Indents in the pavement are all that remain from a grisly death machine in Paris.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

In Florence's great Duomo, a 26 foot fresco honors a mercenary famous for attacking Florence.