A bridge in a place like this?

I guess that means the Former Capital is on the other side...

Hey now, wait just a minute!

You think you can trespass just like that?

Oho!

Beyond here lies the Former Capital of the subterranean world.

Enter without good reason and you'll just end up as oni food, you know? I'm warning you for your own good, so you really should just turn back here.