1. Above the map directly below the San Francisco Bridge, the abandoned ferry cabin goes down from the ladder inside the cabin and then returns to the top through the ladder at the end of the aisle;

2. On the task of salvaging the ship for the first time, get off the ladder of the ship and next to the small house;

3. Get down from the ladder;

4. After that, cross the bridge. There is a ladder next to the gym. Go to the roof and jump over.

The above is the location of the Muay Thai Hall in San Andreas. I hope it will help you.