This "dead marsh" sits among the largest sand dunes in the world, a forest frozen in time.

A desert that rolls right up to the ocean, where it's so dry animals live off the fog.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.

Dr. Strangelove-esque tours reveal the inside a bunker once reserved for Stalin himself.

Enormous statue of the Emperor of the Mongols.

This elaborate towering structure was once famed for its revolutionary height.

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

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

The site of Paul Revere's historic two lantern warning.

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

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

An enormous, inside-out glass globe built in 1935.

A thought-provoking outdoor art installation sits in the seat of German law.

If you visit the burial place of King Frederick the Great, you'll likely find a couple of potatoes sitting on his tombstone.

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

The Goose Girl of Göttingen, Germany might well be the most kissed girl in the world.

The final resting place for a wealthy Roman family, this tomb might be the best preserved of its kind outside Italy.

This historic toy museum brings a little whimsy to a city not usually remembered for such things.

Sitting in the basement of a castle, the largest wine barrel in the world is bigger than most apartments.

Every hour the doors open to reenact the legend of the heroic mayor who saved his town by drinking a gallon of wine.

The small alleys in Lübeck's Old Town are a result of medieval urban sprawl.

The real life town from the Pied Piper of Hamelin has a mechanical puppet show that retells the famous story many times a day.

A statue honors the local legend that the devil helped build St. Mary's church after being tricked into thinking it was going to be a wine bar.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.