Loads of tour operators offering boat tours to various ruined 17th Century Spanish forts. The cruises stop and allow you to explore the ruins or walk in the forests. Most tours go to the Pacific Ocean at Corral and stop for a 30 minute visit here. Tour lasts about 5 hours. Ticket price includes a quality meal and indoor seating. Tour guide narration in Spanish only. Beverages not included in the price. The boats depart from the same area as the fish market.