From A Wiki of Ice and Fire
Queenscrown is an abandoned holdfast and village south of the Wall. Queen Alysanne Targaryen once slept at the holdfast so they painted the merlons atop the tower gold. A stone causeway lies beneath the water that surrounds the holdfast. The third floor of the holdfast has arrow slits, the fourth had windows and the fifth floor was one large round chamber with three sides opening onto stone balconies. Along the fourth side sat the privy. The remnants of an inn and village can still be seen.
A Storm of Swords
Bran Stark, Hodor, Meera Reed and Jojen Reed stay overnight at Queenscrown on their march to the Wall. While they wait out a storm, a man passing through arrives and stays in the ruined village to wait out the storm too. Jon Snow arrive with the wildlings he is travelling with and they capture the man. Jon is ordered to kill the man, but balks and Ygritte kills the man anyway.