where is hightower in game of thrones

Hightower is in Oldtown , in the Reach, in southwest Westeros. It’s the massive lighthouse/castle known as the Hightower, built on Battle Isle at the mouth of the Honeywine River.

In Game of Thrones

In the TV series, House Hightower is barely shown, but the house’s seat is still Oldtown/Hightower in the lore. The best-known Hightower reference in the show is Ser Gerold Hightower, one of the Kingsguard.

Quick map context

• Region: The Reach.

• City: Oldtown.

• Location detail: Battle Isle, near the Honeywine and Whispering Sound.

TL;DR: Hightower is the famous tower-castle in Oldtown, not a separate city.