Islands are ecological ecosystems. Isolated from the rest of the world, the species here may have followed their own evolution path. It is the wildlife in islands that the famous naturalist Charles Darwin studied and made subject of his famous book on evolution: The Origin of Species, considered to be the foundation of evolutionary biology!
The volcanic islands of Canary (Spain, Atlantic Ocean) may not seem much today in terms of terrestrial wildlife, since they practice mass tourism or intensive agriculture (bananas and grape-wines are main mono-cultures). But visiting the islands outside summer season, and ignoring the mass of hungry feral cats in wait for the next wave of tourists, the Ocean rewards you with many wildlife encounters (marine birds, crabs, various species of dolphins and even whales), if only you take a walk along its shores or a boat tour around the islands!
Other interesting activities may be stars and galaxies watching, since light pollution in some places is really reduced, thanks to astrological friendly policies of local administration.
Have fun, if you get the chance to visit!