Explore the complex ecology of this multifaceted nature preserve by riverboat.

This German museum devoted to the simple wonders of salt is actually built over an old saltworks.

A decomissioned facility where the German "Transrapid" maglev trains were once tested.

There are two dozen tanks just sitting in an open field in Lower Saxony.

While most bridges allow roads to pass over water, this one allows water to pass over a road.

This miniature take on the Kremlin is one Dutch man's retirement project.

Yup, that's a 330-foot yacht passing over the highway.

A market built atop boats is one of the few floating holiday markets in Europe.

The world's largest bicycle shelter can hold more than 12,500 two-wheelers.

Unsurprisingly, Holland is home to one of the most magnificent flower gardens in the world.

The Siege of Naarden ended in 1814, but the cannonballs embedded in the town church remain.

The ruins of a medieval castle that once belonged to one of the most powerful families in the Netherlands.

The Bloemen Route, or “Flower Route”, stretches 25 miles through prime Dutch tulip country as a result of “tulip mania,” the world’s first economic bubble.

The largest flower auction house in the world.

A Dutch clog company in the town of Zaandam loves the wooden shoes so much it made a museum for them.

Colorful and chaotic stacked hotel in North Holland.

This 1920s Amsterdam neighborhood was built as a giant experiment in concrete construction.

This 22-floor tower's Skydeck offers panoramic views of Amsterdam.

A set of seven houses, each built in a style that represents a European country.

The last of Amsterdam's original sea level markers remaining in place.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

Europe's first floating restaurant is home to a hilarious legend.

A floating cat sanctuary on an Amsterdam canal.

Debatably clever, or just plain honest hotel advertised as "The Worst Hotel in the World."