Munnar – This is the best tourist spot in Kerala. You’d love to see it 100 times. Munnar is a hill station.
Thekkady – Thekkady has the Periyar wild life Sanctuary that you can visit when you go for boating at Thekkady. Thekkady has a lot of adventurous activities and eco tourism activities too.
Alleppey/Kumarakom – This is the place where you can go for a houseboat cruise. Alleppey also has a lot of resorts to relax, and there is also a beautiful beach.
Kovalam – Lovely beaches
Kanyakumari – Though this is in Tamil Nadu, if you are travelling up to Trivandrum (and if time permits), it is advisable to have a visit.
Athirapilly-Vazhachal – Biggest water falls in Kerala.