what zone is riu guanacaste
800-998-6925. Hotel Riu Guanacaste is located on the seafront in the beautiful region of Guanacaste, on the Pacific coast of Costa Rica. The resort boasts 701 inviting guest rooms, four dining venues, six free-flowing bars and five conference rooms.00-998-6925. Hotel Riu Guanacaste is located on the seafront in the beautiful region of Guanacaste, on the Pacific coast of Costa Rica. The resort boasts 701 inviting guest rooms, four dining venues, six free-flowing bars and five conference rooms.