1 month of no responsibilities, unlimited time, but not too much money?

ok so i have about a month more or less this summer, with no work, no responsibilities, and pretty much unlimited free time. i mean i could lounge and sit around, but i want to do something meaningful with this free time! there wont be too long til im older and bound by a family and a job! (im 19 now) I dont have toooo much money right now, im currently paying to go to school.. but i could probably take about 1000 out if it was absolutelyyy worth it, but id rather not spend that much. but any help on something i could do? like i dont know, a retreat perhaps, or living with an international family, or something life changing!