Well, Here are a few more. Just got the flippers, and am now backtracking to find all the area's previously inaccessible due to not having them. Will come back and finish the dungeon I get them from sometime this weekend, but here are a few more spots I have found. I do not believe there are any spoilers below, but if there are I apologize. Please let me know and I will add a spoiler code to the post.
1: In the center section of Turtle Hills area, if you fall in the gaps between the bridge, it sends you back into the entrance of the caves (byu the same exit that brings you to it..

2: In the Desert of Mirages, at the bridge clipped below, if you fall in the gap between the bridges, it drops you into the dungeon below into a wall. If you use the hole above the bridge though, it drops you into the dungeon normally.

3: On this spot also in the Desert of Mirages,did you mean to have the player be able stand on this sandfall? In the 2nd pic, this sandfall behind the tree (the one with a cactus right infront of it) you can actually walk on, but it acts as a pitfall causing you damage. There was another one I found in a dungeon, but I cannot remember where, and my screen clip did not save for a 3rd pic....

4: While traveling around and backtracking once I found the flippers to investigate previously inaccessible areas, it looks like you might be able to "sequence break" and get into some area's sooner that you are supposed to. I was able to get into the snowy graveyard and subsequent dungeon by doing this.I did not clip that area as I have not found a glitch/bug there.

5: While exploring, I also came across this shop (I apologize, I cannot remember off the top of my head how I got to it outside of a possible sequence break), and the shop has 2 NPC Shopkeepers (or so it seems)...

6: Also while exploring, I came across this screen with the two waterwheels, and you can swim on top of them and even move partially into the next screen above it. This works on both sides of the waterwheels...
