The time has come, friends. It’s time to gather pals and strangers and prepare to create art and to complete challenges ranging from awesome to bizarre because Misha Collins‘ grand worldwide scavenger hunt is back. GISHWHES (Greatest International Scavenger Hunt The World Has Ever Seen) is open for 2015 registration and will take place from August 1-8.

Haven’t heard of GISHWHES? The scavenger hunt has been happening every year since 2011. Teams of 15 participants work together to cross challenges off a massive list. Each challenge is worth points. An example from the 2014 list: “VIDEO. Throw someone a surprise party with friends they haven’t seen in more than 10 years. Film the first moment of their surprise re-encounter.” You can and should read over past lists so you know what you’re in for. They really are challenges, and the submissions people come up with are all over the map. The contest truly inspires creativity—said creativity is on display in the above video. The winning team gets an amazing prize, and this year, a lucky group will receive an all expenses paid trip to the jungles of Costa Rica with Collins.

That’s GISHWHES in a nutshell. The icing on the cake? The scavenger hunt is about more than fun, it’s about giving back. It’s the single largest donor to Random Acts, and the hunt has earned Guinness World Records for things like “the most charitable pledges worldwide.”

You have until July 20 to register for this year’s GISHWHES. You can sign up with an entire team of 15 people or allow the hunt’s organizers to assemble your team. Good luck!

Will you be participating in the massive scavenger hunt? Have you done GISHWHES in the past? Tell me all the things in the comments.

IMAGE: GISHWHES Tumblr