Just putting it out there that I find dungeons in this game are extremely nostalgic to FFXI.
I found the hollow today and I went in and it was like I stepped into an FFXI with upgraded graphics. No music, just cave ambience, with all kinds of mobs and twisted tunnels and special mob camps in rooms deeper in the area. It looked pretty cool too, I like all the sea plants they decorated the place with.
The only thing I'm not too keen on is that wherever I go I seem to have a map for it. I like having to find/obtain maps in some way, not always knowing where I have to go.