Ibones del Alba is a great place to escape from the bustle of daily life. See if any water activities are available here, or just enjoy the calm ambiance.
This body of water in Benasque is popular with many travelers, so make sure it features on your schedule. However, don't end your sightseeing there. There are plenty more places ready for you to appreciate after Ibones del Alba. Cerler Ski Resort, Llanos del Hospital, and Aneto are not far away.