I wouldn't prospect anywhere from looking at your picture, it's just not enough information to risk taking my time. All I see is what might be a place where water flows or once flowed.
Let's look at this from a more logical perspective.
Is this a known gold bearing region?
Is there local geology that might support enough of the right kind of mineralization to produce gold?
Are potential gold or valuable mineral deposits going to be found in hard rock form or placer deposits?
If any of the above prove to be promising - is it legal to prospect there?
Is this private land, county land, state land, federal land, a toxic waste dump?
Are there already mineral claims here?
Those are just the beginning questions I would want answered before I would go to the trouble of putting my boots on to get out of my office and into my truck to prospect any area.
If you can answer enough of those questions to show that we aren't wasting time answering questions about a sandy swamp on private land in Florida I'd be happy to give you my opinion on the little I can see on that picture.
Limited information presented leads to answers based on nothing more than uninformed opinions. Give us some background information worth considering and you will find there are many knowledgeable people here willing and even eager to help you discover the answer to your question.