While we always recommend the use of a GPS, which can be rented along with your car – WAZE works quite well in Costa Rica on your phone – often more accurate than Google Maps. You’ll want to have an international plan on your phone for that – OR rent a WIFI hotspot at the car rental company. It’s never easy getting around Costa Rica , but I will try my best to make it as stress free as possible. Here are some
quick directions
To Atenas from SJO Airport / Highway 1/ Pan Ameican Highway – traditional route
Directions to Los Chorros Waterfalls

And here is a map of Atenas from Google