Your destination really depends on what it is you're looking for in your vacation. Apparently Montreal is a good clubbing destination (at least, it is for 18-year olds since thats the drinking age there, apposed to Ontario's 19 years). If you want lots of fresh air, and beautiful scenery, heading to the mountains is a good bet (be it the real ones in BC/Alberta, or the false ones in Quebec :P), and so forth. What is it you want to do?