Top 10 Skulls

In the Christian tradition, the days that follow Halloween commemorate the souls of exalted martyrs of the Catholic Church as well as those of deceased family and friends. Mexico's Dia de los Muertos, or Day of the Dead, melds Catholic practice with older indigenous Aztec and Mayan traditions, creating a macabre yet joyous occasion, made famous by the ubiquitous Mexican sugar skulls. TIME takes a look at other well-known skulls