Been sick, but back. Saw that
@Legacy intimated that we were close on the American Pie clue, so I'm gonna pick up the breadcrumbs and take a weird stab at it.
The last few posts have been about "The Day the Music Died". The two most likely clues would be 2/3/1959 or Clear Lake, Iowa. If it was a house, it would definitely be the date, but it's "L", so I'm gonna go with the location as the clue.
Looking up Clear Lake, Iowa and horror, I came across this article about a haunted house:
If you dare, we will scare: Clear Lake haunted hike opens Friday (with photos)
There's a lot of potential info to unpack in this article if this is where the clue was to lead. A number of top end IP houses, but that seems too obvious and too much dart-throwing. For me and my weird guess, it's in the name...D and D Ranch Haunted Hike. D&D, as in Dungeons & Dragons, though not necessarily a typical horror property, certainly has some scary elements to it when you think of dragons, orcs, goblins, trolls, etc.
So, for my guess on this one, is that a Dungeons & Dragons Logo is the clue here. This is probably way off the mark, but since we don't know what "L" is and we don't have a shortcut yet, it's tough to know which direction to go.