Parque Nacional del Teide en Guía de Isora Nature · Guía de Isora, Tenerife - Suroeste, Santa Cruz de Tenerife Image of Guía de Isora, not of the place itself. The territory of Guía de Isora, with its highest point at Cerro de las Chajoras (2,674 m), extends into the Parque Nacional del Teide, declared a World Heritage Site by UNESCO in 2007. Photo: Николай Максимович (CC BY 3.0) What to see and do in Guía de Isora