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.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

A museum wholly devoted to juvenescence.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

A Victorian natural history and ethnographic museum with wonderful turn-of-the-century, science-book-esque evolution displays.

Eighty million natural history specimens call this gargantuan museum home.

Catacombs turned marketplace.

Hear the quietest sound from across the dome.

The curios of pharmacist and collector Henry Wellcome.

The only university zoological museum in London houses extinct animals, bizarre natural history specimens, and a Micrarium of microscopic creatures.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

A wall of chewing gum moonlights as collective art.

A museum dedicated to the history and exploration of both popular music and science fiction.

A walk through the historic city center, under the streets of Seattle.

Since 1973, this block has been home to the most concentrated collection of murals in San Francisco.

Golden Gate Park's historic collection of plants.

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

In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Built over an abandoned train yard, this hidden gem is full of winding paths and offers gorgeous views of Sydney Harbour.

Come for the flowers, stay for the bats!

This trio of Australian rock spires may have inspired aboriginal legend or just modern tourism.

This series of Baroque passageways in Vienna's cultural center mix old architecture with modern art.