Set in the mountains in rural northwestern Costa Rica, the Rio Celeste (Blue River) and waterfall is a breathtaking natural wonder that one has to see to believe. The brilliant blue water, which seems altered at first blush. gets its show-stopping hue from a chemical reaction between volcanic minerals.
A walk through Tenorio Volcano National Park will take you along the riverbed. Here, you will see (and smell) the Rio Celeste turn from clear to vivid turquoise. You will also get to admire the waterfall, which is fast becoming one of the country's most popular attractions. Below we share the essentials for planning your visit to the Rio Celeste.