Friends of ours took this tour. They were ecstatic.
There are others, perhaps cheaper, but the website of this one gives a rough idea of what is there.
Costa Rica is better off economically than other Cent. Am. countries. Also it is not too large, places of interest are not too far apart.
http://www.cubadiscoverytours.com/costarica.htm

This Canadian company has long offered tours to Cuba, hence the name; Canada has normal relations with Cuba, unlike the U. S.