This museum may not be everybody's cup of tea, but it's certainly quirky and will get you thinking about all sorts of things you'd probably rather not think about. It's actually just one of six museums located in the Siriraj Hospital in Thonburi, but it's the most engaging one because of its unusual exhibits. These include the mummified body of a serial killer who preyed on children, which Thai parents use as a warning to their kids to behave—or else. Other exhibits include road accident victims, skeletons, and deformed embryos floating in formaldehyde. Definitely not for the squeamish. Depending on your reaction to the exhibits, you might spend just five minutes or up to two hours exploring the place.