Select an existing photo library on your server or create a brand new library to store your uploaded photos. (support.plex.tv)
One that some writers take is to browse stock photo libraries, and pay a small amount (usually in the tens of pounds) for rights to use a picture. (andrewhickey.info)
The site also features a fun science photo library with full image descriptions, online games, and a facts page full of essential science information. (educationworld.com)