Part of the College of Physicians of Philadelphia, the Mütter Museum started in 1858 with the medical research collection of Dr. Thomas Mütter. Known for oddities, specimens, wax models and antique medical instruments; it also includes well-known displays of the tallest skeleton, the liver of conjoined twins Chang and Eng as well as the thorax of John Wilkes Booth. And you can buy a Mütter Museum shot glass in the shop. I know, because I have one.