This a great team building activity to use with adults or adolescents! I favor the GooseChase App so that groups can see the pictures other groups are submitting as well as keep up with the allotted time. Download and familiarize yourself with the app BEFORE you try to facilitate this activity. Or choose another Scavenger Hunt app of your choice. There are many!
I've used this in middle school Advisory as it helps with group collaboration and also includes an element of competition which they get very excited about. I would allot one minute per item, so 25 minutes for each group to capture and submit all 25 pictures listed in this Photo Scavenger Hunt. Multiple students can work as a team, sharing one device. This will require participants to exercise some important soft skills such as negotiating, problem solving and teamwork. There are some specific line items that require all group members to participate in order to get points for the picture. This helps with some inevitable loaner students who may choose to sit on the sidelines and not participate.