珠海是个好玩的地方.
to have fun是不定式作定语,修饰place.
又如：
He will be a great man in the ten years to come.在未来的十年,他将成为一个大人物.（to come修饰years)
I have much homework to do.我有许多家庭作业要做.
Jim is the very man to do it.Jim是做这件事的最合适的人.
This is the best room to live in.这是最适宜居住的房间.