Ruins of León Viejo is a World Heritage Site in Nicaragua. It was the original location of León. It is the present location of the town of Puerto Momotombo in the Municipality of La Paz Centro of the Department of León. It is administered by the Instituto Nicaragüense de Cultura.

Pedro Arias de Ávila was a Spanish soldier and colonial administrator. He led the first great Spanish expedition to the mainland of the New World. There, he served as governor of Panama (1514–1526) and Nicaragua (1527–1531), and founded Panama City (1519). He died in 1531 aged around 90 or 91.