This paper gives a detailed description, including GPS coordinates, of the location of the Ytterby Mine, Resarö Island, Sweden. This mine is famous for its mineralogical treasures and was the derivation of the names yttrium, ytterbium, terbium, and erbium. A number of streets on the island are named after elements and minerals. A nearby museum contains a small exhibit on the mine. A sample of Ytterby gadolinite from this mine (the mineral from which yttrium was discovered) was analyzed and found to contain high concentrations of certain rare earths.