The steps to the Batu Caves are extremly steep. I carried some water up there which was a big mistake. Obviously you need it for when you are climbing the steps. I noticed that noone else had any, i assumed that that was their own stupidity. Once you get into the caves though the monkeys smell your water and the jump on you trying to get the water. My friend had hers in her bag and they jumped on her bag trying to get it out. She was quite traumatised, hahaha. They are big monkeys and not at all tame, they want water or food, if your/ve got it they want it. You want to stop them?