Two awe-inspiring globes from the reign of the Sun King hang from the ceiling of France's national library.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A museum of carnival attractions where you are invited to ride the rides.

This massive library holds what was once the largest book collection in the world.

Notorious artist squat renovated into legal studios.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Abandoned for decades, trains still pass through the now-restored remains of one of Madrid's first metro stations.

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

The largest Art Nouveau complex in the world is a Barcelona hospital with a 600-year-long history.

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

A stately palace has been converted into the world's largest cannabis museum.

A storybook European village in Berkeley.

A working model of the entire San Francisco Bay and much of the Sacramento River Delta, complete with regular tides that change every 14 minutes.

A man-made island in scenic San Francisco Bay.

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

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

A collection of 20th-century automata, penny arcade games, and musical contraptions.

Nestled in the heart of San Francisco’s bustling Financial District stands a unique homage to the Mayan and Beaux Arts.

Tiki luxury on Nob Hill.

Not merely a museum – but a whirring powerhouse that offers a subterranean peek into the heart and soul of cable car operations.

A huge musical instrument played by the ocean.

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

Relics of the 1894 Midwinter Exposition continue to delight visitors today.