Zip Lines in Costa Rica are by far the most adventurous way to see the cloud forest or jungles. You can zip though at high speeds and enjoy a breath taking birds eye views at the same time. Zip lines go hand in hand with Costa Rica and almost everyone who visits will see opportunities all over Costa Rica to try a zip line. There are some larger companies in Costa Rica that are very repeatable and offer zip lines all over Costa Rica.
If zip lines are a little to adventurous for you they do have aerial trams that go at a slower pace and cover the same canopy. However people of all ages try the zip lines and they are a must when you go to Costa Rica!