Guaynabo (Spanish pronunciation: [ɡwajˈnaβo], locally [wajˈnaβo]) is a city and municipality on the northeastern coastal plain of Puerto Rico.Located west of the capital San Juan, east of Bayamón, south of Cataño and San Juan Bay, and north of Aguas Buenas, Guaynabo is spread over 9 barrios and the downtown area and administrative center of Guaynabo Pueblo.[2] The first European settlement in Puerto Rico, Caparra, was founded in 1508 by Juan Ponce de León in land that is today part of Guaynabo.Irish officer Thomas O'Daly and fellow Irishman Miguel Kirwan settled the area in the late 18th century and developed a farm and sugarcane plantation he named Hacienda San Patricio.The plantation no longer exists but the land on which it was located is now the central business district of Guaynabo and the San Patricio Plaza shopping mall.[7] After 24 years as mayor, Héctor O'Neill García resigned in 2017 when allegations surfaced of sexual harassment toward a female municipal employee.[8] He was replaced in a run-off election by Angel Pérez Otero, who in turn was forced out due to his arrest for Federal corruption allegations in 2021.El Nuevo Día,[31] Chrysler, Santander Securities, Puerto Rico Telephone, and many sales offices for large US and international firms (such as Total, Microsoft, Toshiba, Puma Energy and others) have their Puerto Rican headquarters in Guaynabo.The Fiestas Patronales de San Pedro Martir is a religious and cultural celebration that generally features parades, games, artisans, amusement rides, regional food, and live entertainment.[47] Some of the first and newest procedures performed in Puerto Rico during 2009 were done in Professional Hospital Guaynabo, including the first AxiaLIF surgery for lumbar fusion.