How do you get into the royal bathing chamber in dragon quest IX?

Answer 1

Go all the way up on the roof of the palace. There's an older guy fishing in the pool (sneaky) who tells you the water runs into the bathhouse. If you go over to the water, you can jump in and fall down into the bathhouse. Watch the scene,then go into the well.

Answer 2

you have to go onto the roof of the palace in gleeba then talk to the man by the water feature, he will tell you what to do.

Answer 3

You go to the top of the castle and jump into the skylight by the woman who unlocks the Paladin vocation. You'll fall down into the bathing chamber.