The Bolingbroke Penitentiary
Since the newspaper article mentioned that Merle was placed in prison and that’s where he died, it makes since that he would leave his next clue there. Getting into the prison can be a little tricky for as soon as you step inside, you will have a swarm of police on you. Use a helicopter or parachute to drop in and then fight your way to find the markings.
Look to the open yard where the prisons are hanging out in the fenced area and you will find a set of walls in the middle of the courtyard. On one of the walls there, you will find a note that reads:
“Where water meets land and fire once spewed forth
There the infinite 8 shall stay
Until I return”
You can also see another marking just below the clue that is a more in-depth drawing of the one found in the burned out building. With this drawing, you can clearly see that it is a map of the area north of Paleto Bay. Merle wasn’t as smart as he thought he was.