This isn't the beacon seen on the movie, The Return of the King. Using my extensive knowledge of LOTR, I created what I think one of the beacons atop the mountains separating Gondor and Rohan would look like.
About this creation
A close up of the living quarters. I didn't really have the necessary parts for Gondorian minifigs, so I just didn't add any.
The rock piece. I tried not to leave a single stud showing.
The beacon itself.
A zoom out of the beacon and the watchtower beneath it.