Need ideas for a school fundraiser.

My school has a contest where the class that raises the highest amount of money from our fundraising activity gets to win free tour and go to anywhere within the United States. Iíve never been outside of Milwaukee and would definitely want to experience a whole different environment. Any good ideas to raise the highest amount for the event? I donít wanna do the usual activities that people usually do for fundraisers like bake cookies or do car washes because itís kinda generic and itís not gonna generate a lot of cash. Gimme ideas people!