An incredible collection of Mesoamerican art assembled by one of Mexico's great artists.

An alchemist's “magic door” stands in the middle of a Roman park.

This ossuary is more than five centuries old and is heralded as one of the finest in Switzerland.

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

"Respectful to the dead, safe and sanitary to the living, dedicated to the Genius of Memory..."

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

The bizarre visions of H.R. Giger, tucked away in a Swiss medieval city.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

Opulence and fantasy collide in this royal chair which is supposedly made with unicorn horns.

Museum on earth sciences featuring a recreation of a famous curiosity cabinet.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Oldest Museum of the Netherlands is a true cabinet of curiosities.

The only remaining collection of flayed figures made by French "madman" Honoré Fragonard.

This museum houses an imposing skeleton army comprised of creatures great and small.

Natural history museum celebrating biodiversity with a parade of taxidermy animals.

A haunting collection of the vanished and disappearing natural world.

Medieval museum built over Roman baths that features famous tapestries of a lady and a unicorn.

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

Dublin's "Dead Zoo" serves as a window to Victorian museum design.

The mummified heart of a saint lives on in this church—after a brief hiatus when it was stolen.

A book bound in the skin of an infamous criminal, along with countless other specimens.

360° views of the city plus five floors of optical illusions and hands-on science.

The final resting place of soldiers' loyal canine companions.

Used as an example in one of the first dictionary entries for "museum" in 1706.