Summer recreational activities for teenagers?

Over the summer, my youth group isn't having ';lessons'; on sunday nights. Just recreational things. (They need to entertain my teenage friends for 45 minutes to an hour) There's a few of us that are in charge. I need some good ideas. This week we're having a water balloon fight. Next week we're playing ultimate frisbee. Those are the only ones we have. We have access to a few baseball fields, a relatively big room, a huge parking lot, and some pastures in the middle of the country.





I need help with ideas! Thank you in advance!Summer recreational activities for teenagers?
The Kings Game!!





Here are the rules, depending on how many people who want to play


for EXP.5 people. You number four of the straws 1-4. The fifth one you color red or any color you have. You hold the straws and each of you close your eyes and pick the straws. Who ever has the colored straw is the king. The king can tell anyone to do any thing they want but the catch is you can not say the name of the person you can only say the number. For exp. the king commands number 4 to give the king a piggy back ride. I hope you like this game!Summer recreational activities for teenagers?
scavenger hunts, wiffle ball, man hunt