Natural mineral hotsprings on the Rincon de la Vieja Lodge property. There are a number of undeveloped hot springs where you can still soak in solitude under the canopy midway through a hike in the rainforest. If you want vehicle access and a few more amenities with your pool both Hacienda Guachipelin and Canyon de la Vieja Lodge have outdoor rustic spas with massage and mud bath treatments available.