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

The mirrored section takes the shape of Hebrew characters when viewed from above.

The cutest way to stay safe in traffic.

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

These lights mark the area of Rotterdam that was bombed and burned in 1940.

A striking memorial to the Jews of Leiden who were murdered during World War II is scattered throughout the city.

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

This artificial ring island was built to hold cubic tons of polluted dirt.

A museum-like shop that has been producing clogs, brushes, and ropes for nearly 200 years.

Organisms normally seen under a microscope decorate this church.

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

Stained-glass windows inspired by Vincent van Gogh's paintings decorate this church in the town where the artist's career began.

This collection of 20th-century toys is filled with a lifelong personal toy collection brought from the U.S. to Amsterdam.

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

This stately council chamber hasn't changed since 1545.

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

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

A massive stone fox oversees a Rotterdam elementary school crosswalk.

This hotel was once home to a steamliner company and became the final rest stop for Europeans heading to the New World.

This towering church is home to a world-famous organ and a treasure trove of medieval art.

Built by crowdsourcing, this wooden foot bridge saved a part of Rotterdam that was languishing in wait of city funding.

An ancient Egyptian temple sits within a modern European museum.

Repurposed space and ultra-modern construction collide to create this geometric wooden spectacle.

Home to the world's oldest functioning orrery.