Mother Nature has made her playground at Rio Perdido Hotel and Thermal River. Set high up at canopy level in 600 acres of dwarf forest- this Guanacaste gem feels like one of the lost wonders of the world. Every element is inspired by the thermal gorge and natural pools that run through the landscape here. Dip into hot springs- heated by magma- or wind your way across the trails and bridges that crisscross the lost river that gave this hotel its name. There is ziplining and white water tubing too- for thrill seekers. On a more relaxing note- spa therapies here offer a unique take on facials- with volcanic mud body painting in the hot springs one of the signature experiences. Or you could find yourself doing sun salutations at 140 feet on yoga pods that hug the cliffs and look across the rainforest. There are also three striking mineral pools within the hotel grounds- with a swim up bar for those unwilling to leave the warm waters. Bungalows offer an immersive forest experience- dotted throughout the pristine reserve and reached via elevated walkway. Here- your alarm clock will be the call of the characterful Capuchin monkey- while ocelots and pumas call this part of the jungle home. When the clock strikes dinnertime- Rio Perdido serves Costa Rica on a plate. Order from menus that celebrate local- seasonal ingredients- including fruity cocktails- all served in an open sided restaurant up in the canopy. Or reserve the floating platform- set high above the flowing river for a truly unique private dining experience. Bedtime- or hammock time- means strolling through the branches of the trees on elevated walkways- that bring you to your luxury bungalow. Rio Perdido is a Small Luxury Hotels of the World property.