The advantage of spending some time in Tenerife is that it is only one of the seven Canary Islands, meaning that if you have the time, you can explore the rest! The islands are grouped fairly close together- for example, you can see La Gomera from Tenerife's western shores- which makes for both easy and affordable trips.
There are constant ferries running between the islands, complemented by inter-island flights operating out of Tenerife's two airports- so pick your preferred transportation and island-hop your way through the archipelago!
Excursions on Tenerife