A remote island on the Amazon river — now the subject of a territorial dispute between Peru and Colombia — has a single paved road for a main street, which is home to more nightclubs and evangelical churches than any other businesses.
Named after a 16th-century saint, Santa Rosa has no running water or sewage system for its 3,000 residents, who build their one-story homes on stilts to prevent them from flooding every year. People are Peruvian, but they cross the river to neighboring cities in Colombia or Brazil to see a doctor for routine care or an emergency that the rusting local health center cannot handle.
