Arenal Volcano National Park is a protected area in northern Costa Rica. It’s known for its hot springs, active Arenal Volcano and wildlife, including jaguars and tree frogs. Las Coladas Trail winds through forest to a cooled lava field. Rainbow bass inhabit the waters of Lake Arenal, which is popular for water sports thanks to its reliable winds. Southeast, the crater of dormant Cerro Chato Volcano features a lake