"The beauty of Costa Rica’s Arenal Volcano National Park is that you can do as much—or as little—as you want and still have a great time. This is especially true of couples who choose to bed down at the adults-only Nayara Springs, a collection of luxurious private villas with plunge pools, gardens, outdoor showers, and show-stopping views of the Arenal Volcano. Off-property adventures include white-water rafting expeditions down the Sarapiqui River, visits to the 195-foot waterfall in the Arenal Hanging Bridges Park, and a photo tour of the lava fields."