Ever since the 17th century, Los Realejos has hosted a great pilgrimage in honour of San Isidro Labrador. The event was born of the need to make his miracles and legends known to the world after he was canonised in 1622 by Pope Gregory XV. Because of its magnificence and its increasing popularity, the celebration has been declared a Festival of National Tourist Interest. Where: Los Realejos. When: Between May and June.