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](https://gaming.stackexchange.com/) for a screenshot of a computer game
* [Cooking](https://cooking.stackexchange.com/) for an exotic kitchen utensil
* [Home Improvement](https://diy.stackexchange.com/) for a strange tool
* [Board and Card Games](http://boardgames.stackexchange.com/) for a gaming card
* [Science Fiction and Fantasy](http://scifi.stackexchange.com/) for an sf book cover
* [Super User](http://superuser.com) (home/amateur) or [Server Fault](https://serverfault.com/) (pro) for an odd piece of computer equipment

There currently isn't a site about landscapes and buildings. Look on [Area 51](http://area51.stackexchange.com/) 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.