A house of bones — but nobody is quite sure to whom they belong.

A Victorian park cemetery, standing on the site of what was once the Great North Wood.

This modern labyrinth lies in the shadow of a ruined medieval castle.

This historic pub has maintained much of its 1906 decor, including a small sequestered room for women, where orders were slipped through a tiny window.

The sign at the garden gate reads: "These Plants Can Kill."

A unique collection of gilded age mechanical pianos.

A public urinal so pretty, it was declared a national monument.

This subterranean studio is filled with fascinating kinetic art.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This bird-loving brewery is situated in an old municipal bathhouse, nestled beside a 300-year-old windmill.

This cheese shop also houses a museum devoted to Dutch dairy.

A Portuguese Jewish cemetery filled with stunning grave monuments that date back to 1614.

Famed for its pie, this eatery has a hidden tunnel that allowed Catholics to secretly walk to church during the Reformation.

This historic Amsterdam bar used to accept sailor's monkeys as payment.

The world's first zoo for microbes collecting the horrible and wonderful things living on and around us.

A curious collection dedicated to human and animal anatomy and pathology.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Established in 1638 to battle the Black Death, Hortus Botanicus Amsterdam is a treasure trove of rare flora.

Museum preserving torture methods from the past.

This beautiful Victorian ironwork masterpiece was built to keep London from smelling like poop.

A closed London rail station created to cart away the dead still bears the marks of attempts to make it less morbid.

Repository for more than 22 million pickled specimens.

The signs of a long buried road can still be found hidden beneath a London sewer grate.

This wildly-tiled artist's palace is a living and growing account of the creator's life, loves, and labors.