Princess Party

Its my best friends 18th bday and i don`t no what to do, for my 18th we had a really cool tea party, which was great fun, and she got me 18 presents, (one for every year in my life) she loves princess stuff, like the disney shop stuff, i want to take her out for a day trip to somewhere where she can dress up as a princess and have loads of fun, without it being to childish, having princess cake etc... Does anyone no where i could hire somewhere out to do this, thanks