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

Some believe that the artist behind this whimsical statue inserted his own likeness as a way to discreetly flip the bird.

Monument to the cotton-destroying boll weevil.

Commercial airplanes land mere feet over the heads of sunbathing beachgoers on this tiny island.

Looking like nothing more than a cartoon deserted island, this tiny sandbar is home only to a single umbrella.

Under the desolate and windswept northern coast of Barbados stands a small oasis filled with sea anemones.

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

A small park on Bourbon Street features life-size bronze statues of New Orleans musicians.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

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.