I have searched high and dry and have found no spells for any profession that help in locating secret openings. Since it is common to every dungeon, you would think there would be at least one?
I don't know - how often do you do dungeon delves ? I have not done one for the last fifteen years...
Then again, there are secret passages in castles. But most of the time, you are better off trying to find clues to find them - minute defects in stone, wood panels that do not seem to fit perfectly, areas on the floor that seem to accumulate less dust than in other places, and so on - normal perception stuff. Because paying attention is not necessarily suspicious, but casting spells when the castle owners are around certainly can be
