From A Wiki of Ice and Fire

A keep is a type of fortified tower built within castles.
It may refer to:
Keeps
- Great Keep, there are several Great Keeps
- First Keep, an abandoned fortress and the oldest part of Winterfell
- Keep of Riverrun, the redoubt of Riverrun
- Plowman's Keep, the keep of Castle Darry in the riverlands.
- Bloody Keep, a keep at Pyke
- Kitchen Keep, a building within the Red Keep at King's Landing
- Craster's Keep, the home of Craster, an ornery wildling beyond the Wall
Castles
- Red Keep, a castle on Aegon's Hill in King's Landing
- Brightwater Keep, the seat of House Florent in the Reach
- Clegane's Keep, the semi-canonical name for the seat of House Clegane in the Westerlands
- Crow Spike Keep, the seat of House Goodbrother
- Grassfield Keep, the castle of House Meadows in the Reach
- Hall of the Mormonts, also known as Mormont Keep, the seat of House Mormont
- Lord Lychester's keep, the seat of House Lychester in the riverlands