LogFAQs > #967396499

There's only like three walls and a single bush in all of Zelda 1 that have to be bombed/burned in order to complete the game. The rock you have to bomb on the overworld has a clue that isn't particularly great, but it's not a huge leap in logic to figure out, and the bush you have to burn is extremely obvious. Then there are a few walls in the final dungeon you have to bomb, but it's always a case of "you arrived in the room from a staircase and there are no doors in the room" so obviously you have to bomb them