Casa y huerto del Obispo Monument · Ingenio, Gran Canaria - Sureste, Las Palmas Image of Ingenio, not of the place itself. Built in the 15th century amid an extensive orchard, its construction is documented in 1497, and it is considered the oldest standing building in Gran Canaria. 1497 Photo: Mololo (CC BY-SA 4.0) What to see and do in Ingenio