500px.com is a photo sharing site for photographers (and aspiring photographers), offering a place to showcase and even sell their best work. The site is a Canadian startup that has been online for over 3 years. It has over a million and a half members now and accounts are free. It also has one of the easiest to read Term of Service pages I’ve seen. (Legalese on the left, plain English on the right)
If you are prepared to lose some time pleasantly, check it out. I did a search for Toronto, of course, to start my exploration.
Free apps are available for all popular operating systems, devices, etc.