The Shuar of South America is the only tribe to have never been conquered by the Spanish Empire. But the thing they're most famous for is a macabre tradition: shrinking the heads of their enemies.

shrunken head, the size of a small human fist, with a long dark mop of hair, which she offers to sell to me for a few dollars...It is apparently one of those designated as Tsantsa Trophies of the ...

The Swan in Tetsworth, Oxfordshire, had planned a sale of shrunken heads ... work of subduing the tribes and attempting to bring an end to the practice of headhunting. Heads had been taken as ...