LogFAQs > #912126205

The openness in the original LoZ makes for some pretty lame dungeons. All you do is just wander around until you find the end. The only "puzzles" along the way are bombing walls, pushing blocks and trying to remember where each end of a secret passage links up.

The exception I guess would be the one where you get the ladder. That is more close to the formula later games would follow, but still, walking over a one-block wide area of water isn't much of a puzzle.