The above video, creepy enough in it's own right, is based off an even more terrifying Reddit post titled "The Smiling Man," by user blue_tidal, to the "LetsNotMeet" subreddit.
In the post, blue_tidal tells of his run-in with a strange, dancing man in the middle of the night. We don't recommend reading it if you enjoy sleeping or maintaining your sanity.
A tall, faceless figure with horrifically long arms and an eye for fashion, Slender Man has been giving the web nightmares since 2009.
Before looking too deeply into the lore of Slender Man, consider taking a hot bath and spending a night watching a romantic comedy instead. You don't have to do this to yourself.
MarbleHornets is a 76-episode (and counting) quasi-documentary YouTube project.
From what I could gather before I began crying inconsolably at my desk around episode five, it follows the production of a student film and a strange haunting figure that keeps appearing when least expected.
After requesting permission to view your personal information, this Facebook app takes you on a spooky journey into the life of your imaginary stalker.
This subreddit, consisting of user-submitted scary stories will give you exactly what its title promises: no sleep. You'll read one story, binge-read eight more and wish you never ventured outside of AdviceAnimals.
A "creepypasta" is, in short, any short story on the Internet with the goal to unsettle and scare its readers. Creepypasta.com is home to an array of such stories, with fear levels ranging from "slight shudder" to "douse iPad with gasoline, light it and throw it out the window."
Created in 1999, Zombo.com, or zombocom, is a relic of the flash-based Internet. Though it was created as a parody, it's really creepy when taken out of context (as in, after you just watched an hour of MarbleHornets). The deep, pushy voice exclaiming that "This is Zombocom!" is just enough to weird you out late at night.
Something about the homepage photo, the foreboding ellipsis in the site description and the doll galleries for collectors just give us the heebie-jeebies.
The SCP Foundation is a creative writing-based wiki page centered around a fictional organization that captures and contains the supernatural. Users create entries and photographs around these "anomalies."
The SCP Foundation is light enough that you'll lol at some entries, yet horrifically dark at times that you may quit computers for a few weeks after reading.
If, until this point in your life, you thought the Internet was simply a place to connect with old high school friends and find out what foxes say, we suggest you stop reading while you can. Maintain that naivety; it's a beautiful thing.
For the rest of you, who've already seen too much to go back, buckle up. This is going to get spooky.
See also: 9 Books Scarier Than Any Horror Movie
In the spirit of Halloween, we searched for the creepiest, eeriest or downright most frightening places on the web. While we could probably just say "4chan" and call it a day, we went for a slightly different approach.
Peruse this gallery in a brightly-lit public place, surrounded by loved ones and several well-trained attack dogs.
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Image: Flickr, Steinar Johnsen