Passing under the waterfall, and down the stairs leads to another unlit room, scattered with many statues and columns.
(This space would be perfectly suitable for Viola's lab.)
The waterfall from above collects neatly in some channels carved into the stairs leading to this floor, which the follow the edges of the room. The channels were clearly meant to carry a much larger quantity of water, and the trickle that slips across it spreads so thin that it seems not to move.
There is a door, heavily barred from this side, and another open stairwell leading down.
[Cool. Remember that a Regio lab in the Covenants rules has two levels--also, one thing I forgot was that, in her old lab, she had living things, which was both interesting and helpful for some types of magic.]
Viola puts the cat down in a dry spot, and moves to unbar the door.
OOC: wait for it plus, two minor edits: the temple would probably make more sense if it was closer to the side the river used tp be on, so call it the south east corner, opposite the tower. And instead of another set of stairs down, there is a large bas relief of a couple sitting together, which has been destroyed by a giant fist impression. This damaged fresco is a regio boundary.
He opens his mouth as if to say something as you reach for the door, then shrugs, backs up a step or two up the stairs, hunkers down, balances his chunk of roasted horse on one knee and puts his fingers in his ears.
Okay, if there are larger game considerations for the location, then put it wherever you want. The temple as I've been running it had water from the river diverted into it, but given the local, that is hardly necessary.
Seeing this, and after making a display of wiping her feet, Mama Cat pounces towards the faerie guide. Under the guise of seeking attention for food, Mama Cat presses her ears against the fairie's legs to block out possible loud noises.
Beyond the door stand a dozen ancient crones, dressed in tattered rags, their eyes gouged out. Some hold bronze meat cleavers, others carry knives. They let out a tremulous wail, filled with surprise and a deep abiding hunger, and rush towards Viola.
Viola isn't really a combat maga, and suspects she shouldn't kill these crones anyway, and so this is quite a quandary. Her first instinct is to shut and bar the door.
"Naw, Ma is downstairs. Those were....call them my aunts, once called The Handmaidens of Posiedon. They were the virgins who looked after the temple and screened petitioners of the Oracle. And don't worry, you can't kill them. Not permanently."
The redneck creek spirit takes a bite out his flank of horsemeat and chews thoughtfully. He swallows and says, "I ain't going in, but no reason fer you ta worry. They're not dangerous in the way you seem to fear."
He glances at the cat, "Ain't you curious about what's behind that locked door?"
"Of course I am!" replies Mama Cat. "But a wise cat always hedges her bets. Besides, why don't you just tell me what is behind the locked door, and I'll see if it is worth the trouble to have a look. Oh, and why do those virgins look so old?"
OOC: she is just bluffing to try and get more information. Do I need to make a roll? Whatever he says, she'll make a comment about how the info he gave was not enough, and that she'll just have to see for herself. If he mentions danger, she'll try sneak into the shadows as she does so though.
Broken chunks of statue. There's a forearm with most of an elbow that would fly really well.
"I think it used to be the temple's kitchen. They've been locked in there for a while, though, so I forget. And they've looked like since before I was Conceived."
Viola picks up the forearm, waits for the pounding to subside, and then, assuming it does, opens the the door just long enough to hurl the stone at the closest virgin, just to see if it will pass through her.
Remember that a Regio lab in the 
plus, two minor edits: the temple would probably make more sense if it was closer to the side the river used tp be on, so call it the south east corner, opposite the tower. And instead of another set of stairs down, there is a large bas relief of a couple sitting together, which has been destroyed by a giant fist impression. This damaged fresco is a regio boundary.