1.8 Stronghold, Mineshaft AND Ravine (all in 1 seed)
Minecraft Seed: -9119879356190872135
The stronghold in this seed is located right next to a mineshaft and a ravine(mineshaft coords= -526,30,-612).
To get to the mineshaft, you need to go ever so slightly down the cave in front of you until you see the arches in the mineshaft.
The stronghold is right behind the coords you teleported to. The coords for the ravine are -604,32,-600.
The coords for the end portal are -557,28,-586.
To get to the end portal, I would recommend using F3 or a minimap mod that shows your coords.