A tiny, intricate model railway system.

The highest cold-water geyser in the world.

What appears to be an ordinary bridge is actually a rare aqueduct.

A 1:2 billion-scale solar system leads visitors into this German university town.

Now overgrown, these anti-tank barriers from World War II are sometimes called "dragon's teeth."

A taxidermied stork with an arrow through its neck proved that birds migrate.

One of the oldest student jails in Germany.

This small gallery nestled inside an old botanical glasshouse is a quiet place to enjoy art and nature.

Whimsical wash tubs row down the stream as part of this Carnival celebration.

One of the largest busts in the world celebrates the German city's erstwhile namesake.

This natural hill rose another 130 feet from the debris and rubble added after World War II.

Named after the German word for "a longingness to travel," this park brings together thousands of city and street signs from around the world.

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

An extraordinary mechanical calculator designed by the mathematician and philosopher Gottfried Leibniz.

One of the world's oldest fossil exhibits is on display in a beautiful antique "naturalienkabinett."

This tremendous timepiece was once the largest cuckoo clock in the world.

Hidden in the forest are the crumbling, graffiti-covered remains of the factory where most of Germany's explosives were produced during World War II.

These abandoned Cold War-era bunkers are now a designated refuge for endangered bat species.

It has an American Dream Car exhibit, Europe's largest Formula One collection, and many, many mannequins.

For centuries, Germans have been dancing in trees.

This magnificent church allows travelers along one of Germany's busiest roadways a chance to rest and reflect.

A two-inch thick solid brass rod that extends an astounding one kilometer straight into the earth.

The 1852 novel "Uncle Tom's Cabin" lends its name to a subway station, a street, and several shops on the edge of Berlin.

The body of at least one victim of a construction accident was left behind in the collapsed pylon, buried under tons of concrete.