An old slaughterhouse now holds the largest collection of pig artifacts.

This basement museum explores the art and artistry of fascism.

Three connected pink triangles memorialize persecuted gays and lesbians throughout history.

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

A Dutch passageway's artistic, aquatic-themed makeover pays tribute to the capital city's famed waterways.

An ancient passage filled with stalls selling used books, once frequented by Vincent Van Gogh.

This impressive collection of rare books on ancient mysticism inspired author Dan Brown.

A beautifully eclectic mix of architectural styles.

The attic of a four-century-old canal house hides a clandestine church.

The history and future of cannabis.

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

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.

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

An Amsterdam street lined with antique shops each one dedicated to a different obscure collection.

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

This ultra-modern wooden boardwalk turns the ocean into a swimming pool.

A sulfuric martian landscape that looks far better than it smells.

The unique waterfall in Iceland's south features a backdrop of geometric black lava columns.

Three columns of volcanic rock shoot out of the ocean.

A stratovolcano located in the south of Iceland, with a long history of charted activity and a rich mythology attached.

This fantastical waterfall is hidden in a cave located in a cracked cliff.

The oldest hall in Iceland was written of in the Sagas and features a centuries-old escape tunnel.

A modern artist's primitive stone faces and unique rock instrument join Iceland's terrain with its history.