In 1954, the whole area around it was declared a [[national park]], with further expansion later on. In addition, in June 2007 it was recognised by [[UNESCO]] as a [[World Heritage sites|World Heritage site]]. To the west lies the volcano [[Pico Viejo]] (Old Peak). On one side of it, is the volcano Chahorra o Narices del Teide, where the last eruption occurred in the vicinity of Mount Teide in 1798.