San Francisco's newly reopened hands-on science museum.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The only theatre in the world constructed specifically for sound movement.

A tiny theater hidden in an alley plays a constant stream of short silent films for anyone willing to peer through the peephole.

A huge musical instrument played by the ocean.

Sail in for a ’dam good slice.

A beautifully eclectic mix of architectural styles.

This miniature take on the Kremlin is one Dutch man's retirement project.

Incredible labyrinth of man made caves.

A grassy pyramid named after a French battle.

The ruins of this Dutch castle sit atop a labyrinth of once-secret tunnels and passageways, dating back over 900 years.

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

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

Birthplace of the "Cat in the Cradle" and a cluster of iconic, original windmills that let the Dutch tame the seas.

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

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

Inspired by "The Starry Night" this Dutch bike path turns into a glowing work of art each night.

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

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

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

One of Amsterdam's narrowest houses is located right across the canal from its widest.

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.