La Casa de Don David (Hotel near Tikal) INGUAT (Guatemalan Tourism Office) Sailing and Diving in Guatemala and Belize Much Better Adventures The Lonely Planet Ciudades Mayas ADN (Guatemalan Bus Company) Revue Magazine (Guatemalan English Tourism Magazine) Issta Eco-Tropical Resorts Viajero Sustentable (Guia de Turismo Responsable en Latinoamerica)