Carara Biological Reserve : evergreen forests with more that 750 plant species, incredible variety of wildlife including the largest population of scarlet macaws in Costa Rica, exceptional area for spotting waterfowl. 
Manuel Antonio Nartional Park : one of the most beatiful park in the country . The mountains meet the sea and the ecosystem is teeming with land, sea and air species. In all, over 100 species of animals and nearly 200 species of birds have been identified in this park.
Monte Verde cloud forest 
Arenal Volcano and Tabacon Hot springs : One of the most active volcano and fantastic hot spring in the world.
Arenal Volcano And Tabacon Hot Spring by boat across Lake Arenal 
Lake Arenal fresh water fishing tour
(catch the famous guapote rainbow bass) 
Surf excursions all around the country 
Bird watching excursions to one of the best locations in Central America with a wide variety of tropical birds
Poas Volcano
Tortuga island 
San Josť
cultural tour including the Nartional Museum and the Jade Museum featuring the largest pre-Columbian jade collection in the world.