Turn north at the round-about at the village of Padang Lalang. The Beach and various stalls selling souvenirs can be found at the end of the road. Also nearby is the jetty to start river tours through the Mangroves. You get a much better price if you get there yourself and negotiate with the people offering tours instead of booking the trip at travel shops and or resorts.
Datai Beach, Langkawi
Langkawis most exclusiv beach in the north-west of the island. Home to the super-exclusiv Datai and Andaman Resorts
Gunung Raya, Langkawi
highest peak on Langkawi (881m) with spectacular views over the island and even to Thailand when it is clear
Rock-climbing at Batu Caves, Kuala Lumpur
You can rock climb at 4 spots of the limestone hill that also hosts the famous Batu caves temple. Climing the walls is free of charge unless you want to take courses.