These pretty kitties killed and ate as many as 135 railway workers.

Four glass boxes hover over 1,000 feet in the air to give visitors an unparalleled view of Chicago.

Beautiful Austrian natural history museum with carved ceilings and row after row of ancient taxidermy.

Italian poet Dante Alighieri is entombed in this small mausoleum in Ravenna, and his hometown of Florence has never been too happy about it.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

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

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

Erotic art covers the walls of the largest ancient pleasure palace.

Five candy-colored villages on the Italian Riviera.

Filled with goldfish swimming in a shallow pool of sea water, this ancient crypt is more wishing well than burial site.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

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

The glowing blue Nymphaeum of Emperor Tiberius.

The oldest operating pharmacy in the world features 800-year-old recipes.