Fodor's Expert Review Cosmo Andino Expediciones

Operating for more than 30 years, Cosmo is one of the most established and reliable tour operators. All guides and drivers are contracted (not freelance) and the vehicles are their own. The classic tours are all covered, although Cosmo prides itself on beating the crowd with earlier start times and spending longer in each location than the other companies. They offer multiple hiking options, as well as a full-day Tara tour where you can enjoy volcanos, llamas, and spectacular views.