There’s no denying the awesomeness of Flickr in relation to the cornucopia of images Flickr visitors are privy to, images of all kinds of variety. In fact, considering the never-ending growth of its index — earlier this year, Flickr reported its 6 billionth image upload — it would be an exercise in impossibility to categorize them all. That being said, every so often, some photostreams stand above the rest, and deserve to be acknowledged.

Such is the case with the Nightmares Fear Factory‘s index of images. What we have is a haunted house in Niagara Falls taking pictures of its visitors right as they are being spooked, and posting them to their Flickr account.

The results, as you can see in the lead image, are simply fantastic. In fact, I’m having a hard time coming up with a more impressive use of Flickr’s service, although, I’m sure someone will correct me if necessary. In Nightmares Fear Factory’s Flickr stream, there are 20 pages of images to pick and choose from, and you won’t be disappointed with any of the offerings. However, to entice you even further, here are a few more examples of what you can expect:

What other Flickr accounts are you most fond of? Is there one that’s even better than Nightmares Fear Factory? Let us know what you think.