Wasteland

You've been wandering the frozen wasteland for days, perhaps even weeks (you can't remember anymore). You haven't seen a single living soul for at least as long. Cresting a ridge, in the distance, you see a monolithic structure that resembles some sort of natural, but alien pyramid. You are near the sea and notice that the ice has split around the formation and has created a natural pathway leading right to it, as if it is inviting you in. You are hit with a feeling that this structure has some sort of spiritual significance, but you're not sure exactly what it could be. You decide to make the trek and venture inside...