Lonely Planet 2012 Calendar. Founded in 1972, Lonely Planet is the largest travel guide book and digital media publisher in the world and is predominantly owned by BBC Worldwide. Lonely Planet currently publishes 500 guides titles in 8 languages and has other digital media outlets. This official Lonely Planet 2012 Calendar captures some of the most compelling images by its worldwide travelling journalists and includes descriptive content and factoids on the featured locations. A great gift for those who permanently have the travel bug and love nothing more than counting down to the next big travelling adventure!