There are the following National Parks in Canary Islands
La Palma province - Caldera de Taburiente - on the island of La Palma, one of the worlds largest sunken volcanic craters, 10Km across and upto 2Km deep creates a unique landscape with indigenous flora.
Tenerife province - Mount Teide - on the island of Tenerife, the volcanic crater 15 Km across and the peak of Mount Teide, the highest point in Spain and any Atlantic island at 3,718m.
La Gomera province - Garajonay National Park - on the island of La Gomera, shows how each of the Canary Islands can be very different, this is a humid subtropical forest of the type that would have covered most of southern Europe before the last ice age.
Lanzarote province - Timanfaya National Park - on the island of Lanzarote, 5,000Ha of a luna like landscape formed from solidified lava, where there are geysers, hot springs, and the rock below are hot enough to cook food over a hole in the ground.