If you want to try a traditional treat, and are visiting Nicoya here is your opportunity.  Head to the towns of Santa Cruz and Nicoya and look out for palm frond stands where they sell Coyol Wine.  The wine is "milked" from the trunk of a tree grown locally.  You can choose from the strong, bitter wine that is milked from the tree at 6 am, or from the sweet wine that comes out when the tree is milked at noon or 4 pm.  A bottle costs 600 colones and you should buy the traditional appetizer at the stand too, gallina criollo.  (a dish made with chicken).