When A. K. Yearling (AKA Daring Do) is called in to investigate mysterious ruins beneath Canterlot itself, she uncovers an ancient doorway to other worlds. What she doesn't realize is that something is stalking the paths between world, something very old... and very very hungry.
Loved it! Only objection was that it ended :P I like this idea alot, and would love to have more in this style, the TFH fandom certainly needs more of this stuff to hold us over. Working on something myself I hope to be able to post soon. Love to see others making contributions though, and this was a very smooth way to tie it in with Equestria!