Ytterby
mine on Resarö, Vaxholm municipality, Stockholm archipelago, Sweden
Ytterby is a village on the Swedish island of Resarö, in Vaxholm Municipality in the Stockholm archipalego. Ytterby is known for being the source with the most elementa discovered in the world, namely yttrium (Y,) terbium (Tb,) erbium (Er,) and ytterbium (Yb.)
