This 5-by-6-foot wooden hut is the smallest historic post office in the U.S.

This macabre shop, filled with art, oddities, and taxidermy is hidden in the heart of the French Quarter.

The bar where "The Great Train Robbery" was planned was once a nexus of high society and low morals.

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

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

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

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

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

The pile of books behind the dignified writer gave the statue a most undignified nickname.

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

As can be expected from a centuries old church built in a canal city, the undercroft of this house of worship is beautifully flooded.

The only visible reminders of an elaborate engineering project that kept the tower from reaching the tipping point.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

Legend says this mysterious stone head belongs to a woman who was petrified by an alchemist.

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

These medieval skyscrapers dominate the skyline of this small Tuscan town.

Drink wine handed out through a window as part of an age-old tradition.

The only "Egyptian" pyramid in Europe and the legendary tomb of Remus.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A crumbling watchtower and a lighthouse overlooks the site believed to be the Sirens' cliff in the "Odyssey."

The glowing blue Nymphaeum of Emperor Tiberius.

A modern sliver of architecture in Roma.

This curious, round temple is the oldest still-standing marble building in Rome.

The "Greatest Sewer" of ancient Rome is one of the oldest sewer systems in the world, and is still in use.