I was looking for this awesome SPN/Cthulhu fic, but found this instead.
A beautiful, aching post-apocalyptic Supernatural/SGA crossover, the sort that crawls into your chest and stays a while, lingering in the best possible way.
And All the World Beneath by seperis. Summary: Dean remembers Texas as blackland stretching in marker-thick strips of vivid brown and black, broken with the sprawling metroplexes of Dallas and San Antonio and Houston; farms spread with the yellow tops of maize waving in pre-autumn winds, threshers moving complacently through the fields with drowsy men in hats waving at the road. He remembers green and gold fields dotted with cows, half-year calves running on the outskirts of the herds. He remembers these were what he saw between jobs, lives being lived that had nothing to do with creeping twilight and sleeping only behind salt circles and ritual wards.
Tags: supernatural, sga, slash, gen, genre:horror, fic, futurefic, crossover, crossover:sga, crossover:supernatural, a:seperis