The skinned bodies flayed by expert 18th-century anatomist Honoré Fragonard are some of the most renowned yet unsettling specimens in Europe.
Horses, monkeys and even human fetuses are on display, showing all of the gory innards that our skin (fortunately) covers.
Fragonard Museum, 7 avenue du Général de Gaulle, Maisons Alfort, France; +33 143967172; Tuesday-Wednesday 2 p.m.-6 p.m, Saturday-Sunday 1 p.m.-6 p.m.; €7 ($9)
Ibn Sina Academy of Medieval Medicine and Science, India
Named after a 10th-century Islamic philosopher and physician, this museum takes a glimpse into medicine across the Middle East and Asia.
Its modest but ancient collection includes artifacts from Greco-Arab doctors and medical manuscripts dating to the tenth century.
Unani drugs and some dusty-looking tools are on display alongside a large array of busts of then-famous scientists, few of whom will be familiar at all.
There are also handmade antiquated clay and mud molds showing the GI and respiratory systems.
Ibn Sina Academy of Medieval Medicine and Science, Tijara House, Dodhpur, Aligarh, India; +91 571 3290275; Monday-Saturday 9 a.m.-2 p.m., Sunday 4 p.m.-8 p.m.; free admission
Meguro Parasitological Museum, Japan
Celebrating its 60th birthday this year, the Meguro Museum started out when Dr. Saturo Kamegai began exhibiting parasites to raise public awareness after World War II.
His 72 specimens evolved into one of the most intriguing medical museums in the world, with two floors dedicated entirely to thousands of skin-crawling (and burrowing) parasites.
An impossibly long Diphyllobothrium nihonkaiense, or tapeworm, is on display.
Those who want to keep the experience alive can purchase a T-shirt with the creature printed on it, more or less where it would be living inside of you, feeding parasitically.
Meguro Parasitological Museum, 4-1-1 Shimomeguro, Meguro-ku, Meguro, Japan; +81 337161264; Tuesday-Sunday 10 a.m.-5 p.m.; free admission;
Museum of Human Disease, Australia
This educational museum helps you to "know your enemy," presenting more than 2,000 examples of human diseases past and present.
Among the samples are a 19th-century tuberculosis lung, an ovarian tumor featuring teeth and hair and brains infected with mad cow disease.
Largely geared toward students, welcoming nearly 10,000 a year, the museum is the only one of its kind in Australia open to the public.
Opened in 1960, the museum continues to update its collection.
Museum of Human Disease, Ground Floor Samuels Building, UNSW Sydney, New South Wales, Australia; +61 29385 1522; Monday-Friday 10 a.m.-5 p.m.; AU$11 ($11)
Museum Vrolik, Netherlands
This medical and anatomy museum is just one of many trippy experiences in Amsterdam. The 10,000 oddball items from the Vrolik family's collection dating to the 1700s include one-eyed creatures, preserved conjoined twins and so-called mermaid fetuses.
The 16th-century bladder stone the size of a human fist is especially painful to look at, but no more than the pathologically deformed bones or corset livers.
Museum Vrolik, Academic Medical Center, Meibergdreef, Amsterdam; +31 20 566 4927; Monday-Friday 10 a.m.-5 p.m.; free admission