Lucasio was a small town in Mexico. Indiana Jones visited Lucasio, over the course of his adventures in the 1930s. Jones and Marcus Brody were on an expedition to excavate a temple complex known as Site R and established their main base of operations in Lucasio. Indy quickly befriended the locals and employed their assistance during his adventures. Treasure hunters, looters, and Nazis had invaded the region, so Indy often had to leave town and head into the wilderness to recover valuable artifacts before his competitors. Town inhabitants included Bonifacio, José, and Gabriela.