Guanacaste is now very popular as a gateway to the resorts in northern Costa Rica. It has been explosive since the airport opened in Liberia and hotels like Four Seasons in Papagoya became chic.
There is much to do and I signed up for the zip line experience and horse back trail ride in the Rincon de la Vieja National Park. A highlight of the trail ride is a dip in hot springs in the forest.
The one other highlight is to get near Tamarine Beach to watch the Leatherback turtles come up and lay eggs on the beach. I do not think the beach is part of Guanacaste but no matter. The quantity of turtles are diminishing rapidly. Their shells are 5-6 feet and are amazing to watch in the middle of the night.