Highpoint

"And we can burn Highpoint to the fucking ground!"

- Royland Degore

Highpoint is a castle situated in the North of Westeros. It is the seat of House Whitehill, staunch vassals of House Bolton.

Background
Highpoint, as it's name suggests, is situated upon a steep hill somewhere in the North. This hill was once covered by a dense ironwood forest, which was stripped bare. The barren hill then became the sigil of House Whitehill.

"Iron From Ice"
After Ethan Forrester is murdered by Ramsay Snow, his younger brother Ryon is taken to Highpoint as Ludd Whitehill's ward.

In the books
Although House Whitehill exists in the A Song of Ice and Fire universe, the name of their seat is never revealed.