Hey, Xena: Apparently you don't dig shrunken heads. You didn't have to go to Madrid to see them - you can find some along with some other 'shocking' artifacts at the Museum of the American Indian in New York. I don't know if that museum will be moving to D.C. since it became a part of the Smithsonian. Its location in NYC (Broadway & 156th St.) was not in what you would call the heart of the tourist area.

Sometimes we find things we consider to be unique in foreign countries without even knowing of these (often superior) exhibits in our own backyard.