Felwood is a castle in the Stormlands, the region controlled by House Baratheon of Storm's End. The castle is located north-west of Storm's End and south of King's Landing, at the edge of the Kingswood.
In the books
In the A Song of Ice and Fire novels, the castle is called Fellwood and is the seat of House Fell.
- Fellwood at A Wiki of Ice and Fire (spoilers from the books)