Run by a charming French expat, Aventure Colombia specializes in far-flung, off-the-beaten-path destinations nationwide, such as the fascinating Cerros de Mavecure, Parque Nacional Natural El Tuparro and Caño Cristales (July to November) in Los Llanos; Punta Gallinas on the Guajira Peninsula; and indigenous homestays in the Sierra Nevada of Santa Marta.