This newish museum exhibits 360 pieces from Machu Picchu taken by Hiram Bingham's expeditions and recently returned by Yale University, including lithic and metals, ceramics and bones. The collection shows the astounding array of fine handicrafts and ceramics acquired from throughout the vast Incan empire. There's also good background on the Bingham expeditions with informative documentaries (subtitled). Signs are in English and Spanish.
Casa Concha is a beautiful restored colonial home which belonged to an aristocrat at the time of the conquest.