Hundreds of hidden passageways weave through the old quarters of Lyon.

This fascinating museum in an old water tower holds the world's largest collection of Vodou artifacts from western and central Africa.

There has been an astronomical clock on this spot since the 14th century.

An imperial church bombed to ruins during WWII now stands as a jagged memorial.

A monument to the three wars that led to German unification towers within a Berlin traffic circle.

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

The most visited, and possibly most controversial, museum in Germany.

This home designed for chocolate magnate Antoni Amatller is an exquisite treasure-box of Catalan Modernism.

An eclectic collection of thousands of items owned by the sculptor Frederic Marès.

The oldest giants in Catalonia are now displayed in a 14th-century Gothic church.

A vista of the city and sea from atop the little-known viewing deck on an unassuming Columbus statue.

This Funeral Hearse Museum represents the finest in cadaver transportation.

A temple to modernity, tucked away amid Barcelona's more well known museums.

Step inside the first house designed by Catalan architect Antoni Gaudí, considered to be one of the first Art Nouveau buildings.

This cemetery features modernist statues as strange as its name.

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

A beautiful but toxic fountain of mercury.

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 monster at the center of the Darwin Center Spirit Collection.

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

The sixth of London's "Magnificent Seven" cemeteries, and a source of unlikely inspiration to Beatrix Potter.

A cluttered and astounding collection of antiquities and curiosities.

A historic house left in "dramatic still life."