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

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

The iconic boulevard is the perfect place to catch sight of a bicycling skeleton, a levitating Satan, or a chef with his head stuck in a pizza.

The highest bridge in America was built for an almost unnervingly small amount of money.

A winding path built in secret on the edge of the continent.

This private residence was the template for one of the most beloved television homes of all time.

The tea room that pushed the boundaries of adorable straight into...we can't find the words.

Only hotel where you can legally launder money.

Tiki luxury on Nob Hill.

An art collective teaching the more fiery, metal-y art forms.

A collection of memorabilia from the Beat era in the back of a San Francisco bookstore.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

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

A crumbling Beaux Arts monument to the Bay Area's age of rail.

An enormous illuminated figure dances on the Las Vegas strip.

Julia Morgan's Moorish-Gothic labyrinth of fountains, trees, natural light and Oakland's notable dead.

Spiral labyrinth hidden in the hills above Oakland, CA.

A store that sells all manner of bones, insects, and animal curiosities.

A tribute to the life and work of the beloved "Peanuts" cartoonist.

'Cause the fence start shaking, the earth was quaking.

The haunting ruins of Jack London's dream house.

At 207 feet, one of the world's longest continuous escalators.