South America
Tropical Nature Travel - http://www.tropicalnaturetravel.com
Specializes in custom itineraries for individuals and groups to Peru, Brazil, Ecuador and the Galapagos, Panama, Costa Rica and Belize.
InfoPeru.Com - http://www.infoperu.com/
Offers useful information about Cusco, Machu Picchu, Lima, Puno and Arequipa.