The Greatest International Scavenger Hunt the World Has Ever Seen (GISHWHES) is back in 2016 for its fifth year and I* want fans to know that it will be bigger, better and more bizarre than ever.

In my promotional video filmed exclusively for Zap2it, I'm using the latest in mobile technology to send you an intimate personal message that I recorded just for you. I wanted to say hi, catch up a little, and talk with you about GISHWHES.

RELATED: 'Supernatural's' Misha Collins went to a Trump rally and things got weird

In case you don't know, GISHWHES is the Greatest International Scavenger Hunt the World Has Ever Seen. It's one week where we turn the world upside down and participants from all over the planet engage in acts of art, silliness and creative mayhem. The winners of the GISHWHES scavenger hunt will join me on a trip to Iceland! And all other participants will win knowing that they have helped make a big contribution to charity. Click on the link and I'll tell you all about it. I hope you'll join me and with any luck at all, I'll see you in Iceland soon! And, hurry, because registration for this year's hunt is closing in a few days!

RELATED: Misha Collins' fantasy is a GISHWHES national holiday

The 2016 hunt takes place between July 31 and Aug. 6. Registration is open for teams of 15 members, but don't worry if you don't have 15 people rounded up. The GISHWHES organization will put you with other people in your area to make complete teams. The winning team will be sent on an all-expenses-paid adventure to Iceland with Collins. Registration closes July 22.

To play, teams take on a list of over 200 items and upload pictures or videos of their complete items on the GISHWHES website. Since its inception in 2010, over 100,000 people have participated, including some famous faces: Chris Pratt, William Shatner, William H. Macy, Felicia Day and Justin Guarini.

Visit the GISHWHES site for more details and check out the highlight reel below.

*When not spreading good cheer through GISHWHES, Misha Collins is an actor who stars on The CW's long-running drama "Supernatural." He has also appeared on "24," "ER" and "Nip/Tuck." Follow him on Twitter @mishacollins.