Arena is a cute little hotel about an hour to the south of Poza Rica on the Costa Esmerelda. The grounds and pool are beautifully done. And the food is excellent! They have recently moved the restaurant to the beach front, so you have a great view while you enjoy the food (although I recommend dining early--after sunset the mosquitos descend in a cloud). Excellent slow food, friendly--if not terribly adept--service, and a beautiful setting! It's a hidden gem!