Where is the exit from the catacombs?

Hint 1 of 6:

Did you notice the ladder in the center room in the southern tunnel?

Hint 2 of 6:

Did you notice the gargoyle next to the ladder?

Hint 3 of 6:

LOOK at it.

Hint 4 of 6:

Didn't you ever watch any mystery movies?

Hint 5 of 6:

How do they get into secret passages?

Hint 6 of 6:

Turn the gargoyle.