EduVentura at the Playa Mazatlán hotel offers a grab bag of activities and ecotourism opportunities. After trying out the climbing wall and zip line, book a kayaking tour to Deer Island or a whale- or bird-watching excursion through one of several companies committed to sustainable tourism that supports local conservation efforts. Mazatlán, Sinaloa. 669/940–8687. www.eduventura.com.