Identifying things in pictures isn't a general skill or a job in itself or a community maker. So it wouldn't work as a topic for a Stack Exchange site. Rather, you should have at least a general idea of what kind of stuff is on the picture (e.g. you know it's a mountain and you'd like to know which). Amongst existing sites, you could try
- Gaming for a screenshot of a computer game
- Cooking for an exotic kitchen utensil
- Home Improvement for a strange tool
- Board and Card Games for a gaming card
- Science Fiction and Fantasy for an sf book cover
- Super User (home/amateur) or Server Fault (pro) for an odd piece of computer equipment
There currently isn't a site about landscapes and buildings. Look on Area 51 for a site proposal on a topic that would interest you, or start a new proposal if there isn't one already and you're keen and knowledgeable on that topic.
