以下是一些 “不能在景点干什么” 的常见英文表达：
What are not allowed to do at scenic spots?
What should not be done at tourist attractions?
What are the things that are prohibited from doing at scenic spots?
如果你想问具体不能做的事项，以下是一些常见例子及英文表述：
不能乱扔垃圾 ：Don't litter. / No littering.
不能随意涂鸦 ：Don't scribble randomly. / No scribbling.
不能破坏文物 ：Don't damage the cultural relics.
不能践踏草坪 ：Don't step on the lawn. / Keep off the grass.
不能大声喧哗 ：Don't make noise. / Keep quiet.