In a couple of weeks I am off to Koh Samui with some family. My 79 year old mom is going with us, and I have no clue what to do with her 55. I'll be out drinking most nights obviously and will probably meet up with my mom around noon for some sightseeing. Besides being old she is in good health, although I am not sure how far she (or I for that matter 555) can walk in the heat. What can you recommend?