From page 258-259 Jon Game of Thrones
"sometimes I dream about it," he said. "I'm walking down this long empty hall. My voice echoes all around, but no one answers, so I walk faster, opening doors, shouting names, I don't even know who I'm looking for. Most nights it's my father, but sometimes irs Robb instead, or my little sister Arya, or my uncle." Thought of Benjen Stark saddened him; his uncle was still missing. The Old Bear had sent out rangers in search of him. Ser Jaremy Rykker had led two sweeps, and Quorin Halfhand had gone forth from the Shadow Tower, but they'd found nothing aside from a few blazes in the trees that his uncle had left to mark his way. In the stony highlands to the northwest, the marks stopped abruptly and all trace of Ben Stark vanished.
"Do you ever find anyone in your dream?" Sam asked.
Jon shook his head. "No one. The castle is always empty." He had never told anyone of the dream, and he did not understand why he was telling Sam now, yet somehow it felt good to talk of it. "Even the ravens are gone from the rookery, and the stables are full of bones. That always scares me, I start to run then, throwing doors open, climbing the tower three steps at a time, screaming for someone, for anyone. And then I find myself in front of the door to the crypts. It's black inside and I can see the steps spiralling down. Somehow I know I have to go own there, but I don't want to. I'm afraid of what might be waiting for me. The old Kings of Winter are down there sitting on their thrones with stone wolves at their feet and iron swords across their laps, but its not them im afraid of. I scream I am not a Stark, that this isn't my place, but it's no good, I have to go anyway, so I start down, felling the walls as I descend, with no torch to light the way. It gets darker and darker until I want to scream." He stopped, frowning, embarrassed. "That's when I always wake"
I think this goes hand in hand with Jon's future and gives a bit of a hint as to what lies in store for Jon in Winterfell.
Im just curious what is going to be under there, my most reasonable thought is lightbringer sword which emanates heat.
Which is the reason why Winter Fell ..
If Jon is really Azor Ahai Reborn... this will explain alot of things with Melissandre losing sight of Stannis and seeing only Jon.
Approximately eight thousand years before Aegon's Landing, in the midst of a great winter that lasted for years, a terrible darkness fell across Westeros and the east. The Long Night lasted a generation and laid waste to much of the world through famine and terror. In the midst of this darkness a race of apparent demons emerged from the uttermost north, wielding razor-thin swords of ice and raising the dead to fight the living. The children of the forest and their allies, the First Men, fought valiantly against them, but were driven southwards by their advance. The 'Others', as these demons were called, were eventually checked when it was discovered that weapons made of dragonglass (obsidian) could kill them. A great hero, who in the eastern tradition is known as Azor Ahai, led the war against the Others wielding his sword of fire, Lightbringer. Eventually the Others were driven back into the Lands of Always Winter. Brandon Stark, known as Bran the Builder, raised a great Wall of ice, gravel and magic, stretching one hundred leagues from the Gorge to the Shivering Sea to prevent the Others coming again. Brandon Stark was declared the First King in the North. The fortress of Winterfell (and possibly Storm's End in the south) was built at this time, and the Night's Watch founded to maintain a watch on the Wall. A later prophecy claimed that the Others would return and Azor Ahai, the Prince that was Promised, would be reborn to lead the fight against them.