3,000 market stands in five former Zeppelin hangars.

A stone marker and sculpture in the city of Riga stake a claim for the very first community Christmas tree.

A black cat protests the City Guild in Riga's Old Town.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The site of one of the strangest disasters in history—a wave of deadly molasses traveling at 35 mph.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

An interesting decoration on this historic site, this weathervane comes with as many legends as it does questions.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

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

This bustling Italian plaza is built on the ruins of an ancient Roman amphitheater.

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

The small peaceful island off the Venice tourist circuit is where the city began more than 1,500 years ago.

Five candy-colored villages on the Italian Riviera.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

One of the most beautiful bookstores in the world hides a neo-Gothic interior behind an art nouveau facade.

Of the many chalices in the running for the Holy Grail, this one in Valencia Cathedral sure looks the part.

This massive fiberglass Gulliver turns every visitor into a Lilliputian.

Over two centuries old and counting, Madrid's massive botanical garden contains one of Europe's only desert environments.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

The world's oldest bookshop still in operation.

Spain's unique Mosque-Cathedral has been a place of worship for both Muslims and Christians throughout its history.