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

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

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

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

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

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

The world-record holder for the longest bridge stretching continuously over water.

Made of giant chains and hung with shackles, this iron cross honors those unknowns who perished under American slavery.

The beautiful, fruit-covered facade hints at this building's former life.

By day this New Orleans square is for pedestrians, but by night it is a kingdom of kittens.

One of the oldest continuously-operated gay bars in the United States is allegedly haunted by Truman Capote and Tennessee Williams.

Once the site of a Native American harvest festival, this humble clearing later played an invaluable role in the birth of jazz.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

These paved rills bring freshwater into Altstadt and could spell wedding bells for whoever stumbles into the waters.

The great Danube river starts here.

Explore this medieval cathedral by trying to spot all the malevolent monsters hiding in its beautifully colored windows.

Every day is like Christmas on this street where the traditional Neapolitan nativity scene comes to life.

Pompeii's less famous neighbor is still revealing her secrets.

This seaside Italian village doesn't just look Escher-esque, it actually inspired the mind-bending artist.

A beautifully well-preserved ancient Roman villa.

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

This 6th-century church has the largest and best-preserved collection of Byzantine mosaics outside Constantinople.

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

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