Challenge yourself and hike up El Teide Peak. Amazing scenery and a great sense of achievement will be the payoff!
You're spoiled for sightseeing choice when visiting La Orotava. El Teide Peak is a good place to start here, but there are many other worthy places to appreciate. Teide National Park, Mount Teide, and Teide National Park are close to the steep landmass and will round out your day nicely.