Quite simply one of the finest parks in Costa Rica, Rincón de la Vieja National Park has everything nature lovers and hiking enthusiasts could want. Curiously, it ranks only ninth among the country's most visited parks, owing to its remoteness. The landscape here is unlike anything you will have seen before. It is particularly notable for its famous “pailas”, geysers that spew clay at temperatures exceeding 106 degrees Celsius. As you walk, you will discover waterfalls and bubbling volcanic mud springs, all set within tropical rainforest where, with a keen eye, you can spot countless animal and plant species.