Ao Nang village is not the most picturesque in Thailand- its more a great base for exploring Southern Thailand.
This is a great website covering some of the activities available: http://www.yourkrabi.com/
These activities in no particular order may appeal:
- Boat over to Railay Beach- kayaking, climbing, swimming etc
- Boats to over local islands, koh poda, hong etc
- Inland activities; go karting, painballing, etc
- Kayaking out to mangroves
- Cooking courses
- Spas, bars and restaurants!!