A museum on the history of Paris, including a set of Napoleon's toiletries, Proust's room, and relics of the Revolution.

Paris' fabled purveyor of exotic taxidermy and natural history curios.

Where the high court feasted, frolicked, and high courtesans put their royal lovers' diamonds to the test.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

The former home of France's controversial pop maestro is almost completely covered in ever-changing tributes and graffiti.

Dedicated to the art of hunting, with juxtapositions of contemporary art.

If you look closely at the oldest bridge in Paris, you might notice hundreds of ugly faces leering from its sides.

A unrivaled and rather horrifying collection of wax dermatological models.

France's national museum of scientific and industrial instruments.

This Funeral Hearse Museum represents the finest in cadaver transportation.

A cemetery in Barcelona's Poblenou district is home to this touching funerary statue, which depicts death in the form of a winged skeleton.

A beautiful but toxic fountain of mercury.

The studio of Catalonia's most famous theatrical designer remains exactly as he left it.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

A beautiful little museum hidden away in the heart of Barcelona holds a treasure trove of Ancient Egyptian artifacts

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

One of Antoni Gaudí’s earliest buildings, built between 1886 and 1890 for the industrialist Eusebi Güell.

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

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

The 2,000-year-old Roman columns are hidden within Barcelona's Gothic Quarter.

A submerged archeological park still holds the wonders of a Roman Sodom.

Nestled in the hills of Tuscany are gorgeous, multicolored hot springs.

This smily stone feline is meant to represent a mythical lion that almost destroyed the island of Kea.

Poseidon? No one seems to know.