Nagga's hill is located on the island of Old Wyk in the Iron Islands. It is the site of the Grey King's Hall, where in past times, the ironborn chose their kings in a kingsmoot. It is on a hill overlooking Nagga's Cradle. The ribs of Nagga, a dead sea dragon, rise from the ground like large white trees as wide as a dromond's mast and twice as tall.
A Feast for Crows
At Pebbleton, Aeron Greyjoy preaches that a kingsmoot should be held at Nagga's hill to choose the new king.
The kingsmoot is held at Nagga's hill, choosing Euron Greyjoy king.
Chapters that take place at Nagga's hill