Secret dungeon?

Hi
I want to know what is " secret dungenon", how can i get there and what is in it ? If someone know please tell me :)
Thanks all

Seem to be, that this will be asked every week now. Secret Dungeon is an extra Dungeon for castle owners. There you can grind with good XP. But this dungeon is just for castle owner, so u have to join to guild with a castle, or capture one with your own guild. In each castle is a porter to join SD.

And poison mobs might rape your face if you not prepared for it. =)

Yeah, but there a lot of mobs u can handle

with full party buffs and a good caster you rullerz there :)