If memory serves, it's probably more effort than it's worth to show off the insides of that area. I seem to recall that all the chests are outside anyways so it's mostly figuring out which door leads to where you want to go, which you've already got covered on the outdoor maps.
That's the name for the region where Ys used to be before it vanished and left that nice crater in the landscape. Complete and Chronicles both use Bagyu Ba'dead (well, the name in katakana) when referring to that area so Dawn of Ys was ahead of its time there. Mask isn't technically incorrect though.
PSX brave prove is finished, so now I can focus more on Ys4. Also I mapped out the 1st chapter of legend of xanadue 2 but I will not finish that game since its in (J) and there is no translation for it.
I finished playing this before Christmas and I plan on running through it a second time. I don't think I ever played the original, so I don't exactly know how the original two differ. Storyline-wise, I'm very interested to know how they're all different/similar. I wonder if there are any oops type of retconning going on? ;P