Unveiling Paradise: Travel + Leisure Celebrates Costa Rica s Ecotourism Wonders – The Costa Rican Times costaricantimes.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from costaricantimes.com Daily Mail and Mail on Sunday newspapers.
Twin rivers escape from springs underneath the Tenorio Volcano, their clear waters twist away down the valley through the Tenorio National Park. As the rivers merge, their waters churn into a fluorescent blue; a chemical reaction caused by the crystallization of copper sulfate, colloidal silica and sulfur.