The number one activity and why people come to visit Costa Rica - watching a sunset from the Pacific Ocean. Each sunset in Guanacaste is different from the last, always spectacular. View them from the open waters of the ocean, or while relaxing on the beach. Never waste any amount of time doing something important when there is a sunset outside that you should be sitting under. Enjoy the best sunset activities in Guanacaste, Costa Rica. From sailing the oceans in any of our boat activities to hitting the mountain trails on your ATV. Watching the sunset is a must-do for visitors coming to the area. It's one of our top free tours and things to do and every day it's completely different.