In reply to emilya:
There is limited bouldering in the Arico gorge and you can hire bouldering mats at the climbing shop at Arico where I'm sure they will give you all the info on other areas.
Lots of great walking on the Island as well with well marked trails and walking guidebooks available in several languages. The Masca gorge walk is a must and starts with a taxi ride to the top from Los Gigantes and a boat ride back round from the bottom. It will be well publicised locally.
