Today, I went Geocaching with my friends today in various unique places near our dorm. Geocaching is basically a high-tech treasure hunt involving coordinates that are given to you and you go to those coordinates to find a random item. You need a GPS, a good amount of friends with you, to think out of the box, and lots of patience . We went to two places in all, but only found one of the items. It was a necklace. So we replaced it with a ring that one of my friends had. When you do find the item, you need to replace the item with one of your own with the same value or so.
Basically this is pretty fun and it is something to do with nothing else comes to mind. You can do this anywhere! Geocaching is worldwide with locations everywhere, I believe. You just have to go!
Here's a link to the site to get started.
http://www.geocaching.com/