This massive mural by famed pop-artist Keith Haring was hidden for almost 30 years until its 2018 rediscovery.

Tucked in the back of a flower shop, its collection details the fascinating history of the Netherlands's iconic symbol.

The world's oldest Jewish library was founded by Sephardic Jews in 17th century Amsterdam.

This museum inside Amsterdam's largest cemetery explores how people deal with death.

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

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

A crumbling hospital from the 1850s on Roosevelt Island.

An Orthodox church inside a small "Garden of Eden" built by a man who had a vision.

Go surfing on this urban wave, "hacked" by local surfers.

A museum dedicated Germany's favorite drink and most well-known festival.

At this exhibit on the world of poison, venomous animals steal the show.

A small marionette collection located within the dark cellars of an 11th-century Austrian castle.

This 19th century cyclorama acts like an analogue time machine to a different era.

This Japanese treats shop may have been the first business to mass-produce fortune cookies in the United States.

Floating man-made island and upscale restaurant.

Home to one of the world’s largest collections of model yachts.

The first fresco Diego Rivera painted in the United States can be found in the former San Francisco Stock Exchange.

The only visible piece of San Francisco's most famous shipwreck.

An art supply shop holds the secrets of this quiet neighborhood's raucous Barbary Coast past.

A library built during San Francisco's pioneer times is a student's retreat, bibliophile's sanctuary, and chess player's delight.

A free, public museum dedicated to the fascinating science of sight.

A walk down memory lane in the heart of one of San Francisco's most notorious neighborhoods.

This turn of the century masterpiece has a mysterious goaty interloper.

A shop full of natural curiosities, carnivorous plants, and costumed taxidermied mice.