Down a cobblestone alleyway is a museum dedicated to Romanticism, with a secret garden.

Inside a former cabaret, seven floors of erotic art.

This Parisian café sticks almost exclusively to an ethos of reuse.

An overlooked marble is the only surviving in-place 18th century example of the measurement that changed how we define distance.

A counter-culture bookstore like no other hides in plain sight in the streets of Paris.

France's most famous cemetery, with some of its most curious tombs.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A long-closed church turned into a saintly skate park.

The spectacular history of spectacles on display.

A large measuring stick marks the lowest point of a country that is partially under sea level.

A tiny house showcases the busy life of a local gnome.

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

A giant yellow phallus sculpture hidden in the gardens of the Museum Boijmans Van Beuningen.

A massive explosion that leveled hundreds of buildings in the city of Leiden is remembered by a waterside plaque.

This public toilet built in the famous Amsterdam School architectural style is a Dutch national monument.

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

This small museum collects the Christian remembrances which would otherwise be forgotten.

The portrait of a man from Japan who sent weekly letters to a Dutch hotel he never visited.

A sanctuary for sickly, stray, or wounded donkeys.

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

The elegant manor house where Kaiser Wilhelm II lived in exile after World War I.

This functional solar system model was inspired by the famous Eisinga Planetarium.

The world's largest collection of ships in bottles.

Hop aboard a charming bog train to explore this rare open-air museum of peat.