You know you’ve been there–that “weird part of YouTube.” While some of us got there accidentally by clicking on a “related” link from a fluffy kitten video, others purposely seek out YouTube’s creepiest videos. Brave souls, indeed.

With Halloween just around the corner, it’s the perfect time to indulge our morbid sides by exploring some of the weirdest videos on YouTube. In a post in the Ask Reddit community, user skepticpaul asked “What’s the most mysterious and unexplained video on the Internet?”

The responses are spooktacular. Check them out:

Of course, there were some skeptics that questioned the legitimacy of this video:

While we’re unsure about the origin of this video, it’s featured on a bootleg DVD compilation that was allegedly compiled with the help of a porn producer: “Ensuring Your Place In Hell Vol. 1 contains a collection of shorts that are so fucked up they will ensure your place in hell for owning them!”

Found footage: Man lost in the Paris Catacombs:

According to the tabloid Epoch Times (grain of salt), the video is over 40 minutes long. Near the end of the video, something frightens the cameraman and he begins to run faster and faster. At one point, he drops the camera and the footage ends. Nobody knows what happened to him. Blair Witch in Paris? The bitch is back.

One, um, “Columbine expert” describes this woman’s obsession in more detail:

Others suspect that her craziness is just an act:

In 2013, Elisa Lam—a 21-year-old Canadian tourist—checked into the Cecil Hotel in Los Angeles. She was found a few weeks later, dead, in the hotel’s water tank. Hotel guests bathed in, brushed their teeth with, and drank from the water for as long as 19 days. (The water “tasted horrible,” one guest remarked. “It had a very funny, sweety, disgusting taste. It’s a very strange taste. I can barely describe it.”) While investigators ruled her death to be an accident as a result of bipolar disorder, nobody has found conclusive evidence that she wasn’t a victim of murder.

Interestingly, the hotel inspired American Horror Story’s new season. Since its grand opening in the 1920s, the Cecil has been the site of numerous unresolved murders and suicides. In the 1980s, the hotel served as the home of famed serial killer Richard Ramirez.

Of course, redditors debated about the origins of this video:

Check out more creepy videos here.