If you are attracted to get to know Costa Rica in a quick way and avoid spending several hours on long journeys, you can travel by plane.
There are several national companies that have light aircrafts which carry between 9 and 25 passengers and provide air services within the country. As they are connected with 15 national airports, so it is possible to go from one end of the country to the other in a short period of time.
Furthermore, it will cost you little money because you have the chance to take a transport pass that you can use in every aircraft transports that you want over a limited period of time, usually during one or two weeks, by paying a reasonable amount of money.