San Pedro (Trichocereus pachanoi) is a cactus native to the Andes of Peru, Ecuador and Bolivia. San Pedro contains mescaline, a hallucinogenic drug also found in some other species of genus Trichocereus (i.e.T.bridgesi) and Lophophora.
San Pedro de Atacama is a town in the Atacama desert of northern Chile, bordering the Altiplano (high plain) region and the Bolivian border. It is overlooked by the 19,000-foot volcano Licancabur.
San Pedro, California, USA, is home to the Port of Los Angeles.
San Pedro, Coahuila, is a municipality in that Mexican state.
San Pedro, New Mexico, is what's left of a village on the opposite side of the Rio Grande from San Antonio, New Mexico, USA. The last major flood on the middle Rio Grande caused severe damage in San Pedro and left San Antonio unscathed.
San Pedro, Argentina, is a city in the Province of Buenos Aires.
San Pedro is the Spanish form of Saint Peter.