The location of the world's first telescope demonstration.

This museum is filled with an eclectic collection of unique inventions.

Nestled in the woods lies this land art project: a hybrid between park, maze and natural monument.

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

Preserving the research tools, unexpected inventions, and odd collections of generations of college professors.

A condensed piece of China floating in a Dutch harbor.

A massive stone fox oversees a Rotterdam elementary school crosswalk.

A Dutch museum preserves the world's most diverse collection of vertical slices of soil.

Organisms normally seen under a microscope decorate this church.

A farm turned upside down.

This large open-air museum showcases the ordinary lives of the people of the Netherlands and pre-industrial crafts and practices.

The only bicycle museum in the Netherlands charts the invention of the now-ubiquitous two-wheeled machine.

A set of beech hedges planted in the 19th century forms a tunnel that takes on a different appearance in every season.

A solid steel plane designed to catch fire over and over again.

A uniquely preserved neo-Gothic church that is now home to a collection of art and woodcarvings.

Underground attraction offering tours of the foundational ruins of a church nave that collapsed in 1674.

A monument to the 16th-century mathemetician who dedicated his life to calculating the numerical value of pi.

A floating cat sanctuary on an Amsterdam canal.

The spectacular history of spectacles on display.

This vast collection of smoking pipes from across the world spans centuries.

Some 80,000 Delft Blue tiles line the inside of this Amsterdam walkway.

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

This large copper bolt represents the benchmark for measuring sea levels in most of Europe.

A unique collection of gilded age mechanical pianos.