The former atelier of Mario Cassisa is a treasure trove of paintings, sculptures, and artist books.

This extraordinary geological oddity resembles human-made pavement.

Legends surround an ancient tree trunk riddled with nails for good luck.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

A wonderfully strange collection of 500+ stuffed frogs doing people things.

Taxidermy of the racing horse with a huge heart, who inspired hope in the Depression.

The other side is actually green.

Microscopic scenes; some call it novelty, some call it art.

The hidden lair of an alchemist rediscovered in a 2002 flood.

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.

This 17th-century street hidden beneath Edinburgh was once a breeding ground for the black death.

Explore nearly 400 years of English middle-class home life.

The Florence Nightingale Museum is home to the famous nurse's most treasured possession: her beloved pet owl.

House of vintage taxidermy and Steampunk sculptures in a quiet Pittsburgh neighborhood.

A New Zealand couple's shell-adorned home living room, now on display at the Canterbury Museum.

First a horse rendering plant, then a 19th century landfill, this beach is full of glass from thousands upon thousands of broken bottles.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This small chapel is built of human bones and decorated with a golden skeleton.

A terrific purveyor of natural history objects and curios.

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

Strange red rock formations that have been attributed to a higher power for hundreds of years.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

The most loyal of little dogs, or a Victorian era publicity stunt?