Millions of glowing microscopic organisms light up the waters of this luminous lagoon.

The watery entrance for condemned prisoners heading to the Tower of London is still visible along the Thames.

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

Thanks to modern navigational tools we now know that the true prime meridian runs through a park next door.

Eighty million natural history specimens call this gargantuan museum home.

A curiosity-seeker's paradise set inside a three-story historic school house.

The Midwestern United States' tribute to Michelangelo is a foam statue sprayed with gaudy gold paint.

The oldest operating Mississippi River–style steamboat still navigates the Ohio River.

Everyone and everything one man ever loved and lost, now stare into the East for all eternity.

Eight rare Corvettes are swallowed up by a sinkhole in Kentucky's National Corvette Museum.

The world's longest known cave system.

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.

This singular Irish dolmen is more Frank Lloyd Wright than upright stonehenge.

A rocky Irish outcropping with a history of wealth, conflict, and ruin.

The comedy and tragedy of Oscar Wilde is preserved in a Dublin park, captured in a sculpture of colorful stone.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

This distinctive Crescent City tradition dates back to the days of horse-drawn carriages.

The beautiful, fruit-covered facade hints at this building's former life.

A building so large that it has its own weather.

Florida might be at its most surreal in this museum devoted to the famed Spanish artist.

Florida's oldest bar was once a morgue, complete with a hanging tree and gravestones.

The museum chronicling a treasure hunter's dream, fulfilled.