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

Devious political maneuvering and four ancient, working telescopes are central to the world's second-oldest observatory.

Unknown to many, this is where items not displayed in a Dutch history of science museum are held.

A lecture hall sink once used by Einstein and other noted physicists is now regarded as a strange science relic.

This historic Dutch newspaper building is covered with media-themed details—and one unrelated oddity.

A trio of red, white, and blue stones embedded in the streets of Leiden are markers of medieval territory and law.

Tucked away in the Leiden city hall are a group of works by famed artist MC Escher.

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

A giant bug impaled on a 75-foot-tall needle.

Pull up and have a drink at a museum filled with hundreds of years worth of shipwreck artifacts.

The world's only museum devoted to the wonders of fluorescence.

This city square is home to Amsterdam's oldest church and a statue honoring Dutch sex workers.

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

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.

The place where Czar Peter I of Russia resided in 1697 during his Grand Embassy.

The largest 19th century panorama in the world still in-situ.

The history and future of cannabis.

Amsterdam's Red Light District leaves little to the imagination.

Part modern art project, part traditional chapel, this see-through church is only substantial from the right angle.

Unchanged for centuries, this medieval library keeps its books in chains.

An idyllic hotel that gave its name to a supposed shadow government.

Two gravestones clasp hands over the religious divide.

This Netherlands museum holds a gloriously mechanical collection of ornate musical automata.