it is a small island and if I want to plan things , then : you can go around the coast, there are no highways in Sri Lanka, just a good main road that goes around the island along the coast with beautifull scenery full of people and shops, temples etc ...the other thing to do is the inlands : very serious mountains , jungles and very important buddhist sites. Jan is a good time to go - enjoy. after cycling , visitors also go to the close by Maldives Islands (no cycling there ) if you want to relax and enjoy beaches, snorkling, diving etc