3 months travelling in central america - I recommend Guatemala
Guatemala is a very very nice country to visit. San Marco on Lake Atitlan is a perfect place to relax and enjoy the beauty of the nature. There are cliffs for diving and the water is very pleasant. Kayaking is a nice way to explore the coasts of the lake...or hopping on mini buses from village to village. You can find many good and healthy restaurants. For falafel lovers go to Moon Fish restaurant in San Marco. There is a spiritual atmosphere, so if you like meditation or yoga or reiki etc it's the place!