Make sure you are properly dressed, just like when you visit a temple (no short pants or sleeveless top). But if you forget, they can provide you with long pants and shirts. They also provide plastic bags in which you have to carry your shoes, so don’t go there with your hiking boots! Also please be aware that you can’t take pictures of some rooms (especially the King’s bedroom and bathroom, as they are considered too intimate). Please mind the signs. Finally, if you go there by motorbike, turn off the engine and get down from the bike when passing the entrance gate. Don’t forget that this is a royal palace and that Thai people have a great respect for the monarchy!