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

A nuclear reactor created for Eisenhower's "Atoms for Peace" campaign is now used for research at a Dutch university.

It's forbidden to dig within this ancient Roman fort hidden beneath a playground.

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

This early 19th-century graveyard is the final resting place of Vincent van Gogh's mother.

This giant radio telescope would be a rusting ruin if it hadn't become such a beloved relic.

Once the world's biggest telescope, it was later used as a coat hanger by a famous Dutch astronomer.

Inside this metro station is a section of the city's former medieval fortification.

The location of the world's first telescope demonstration.

Four giant movable street lights decorate this modern Rotterdam square.

This Dutch art piece became a Russian icon.

A nearly 25-foot concrete sculpture of Sylvette, Picasso's muse.

The world's longest wildlife overpass provides Hilversum's critters with a safe alternative to trying their luck on the roadway.

The world's largest private telescope collection hides in a secret wing of a Dutch auto museum.

This public library and its impressive collection of academic books have not changed since the 17th century.

A radio telescope for listening to the stars, based in one of the cloudiest countries in the world.

The nerve center of a massive, state-of-the art radio telescope that sprawls across Western Europe.

A sanctuary for sickly, stray, or wounded donkeys.

An impressive array of unique homemade planetariums.

This stately council chamber hasn't changed since 1545.

Lumps of significant stone from around the world surround a flaming monument for peace.

The former headquarters of history's oldest megacorporation.

A modern reimagining of a medieval city gate.

One of the Leiden's oldest pubs is also the birthplace of the Heineken star.