The SCP-Wiki is a website that contains a collection of stories surrounding the SCP Foundation, a fictional organization that aims to "Secure, Contain, Protect" unusual and surreal entities and anomalies. Stories can be in two formats, an SCP article (which is written like a report of the anomaly in the fictional database of the organization) or a Tale (just like a regular story which can be in almost any format).
What do you guys think about writing for this website? Personally I think the website is a fun and productive way of practicing writing fiction. The website expects high-quality and college-level writing and the people there give very constructive advice on how an aspiring writer might construct their story. The skills I've gained from this website have been useful in my other writing projects. Really encourage aspiring writers to give this website a try.