Fountain in wolver den
I was in a wolver den today, and just before the elevator was a statue surrounded by water. I hit it with an avenger charge (yes, avenger in wolver den. I was bombing them all anyway) and about 50 crowns popped up around me.
Is this common knowledge?

Although there's still many pubbers who will walk by it, unaware.

Imperial, there is a wiki page with a list of scenario rooms, I believe. Barring that, there is definately a thread on scenario rooms in the wiki part of forum.

Used wiki search button.
Showed them all with a bunch of pictures, but nothing describing their purposes.
I'll look around for the thread.

I've seen that one pretty frequently. Only seen this one once though: http://steamcommunity.com/id/nicoya/screenshot/594708803528443942?tab=pu...

Ya i think that one is common(i did a ton of beast stratum runs for monster bone reciently and i have seen that one at least 10 times during that, i even saw 2 in one run when i did tier 1-3) but ya i think that one is one of the more common ones, i have seen 2 others for the wolver dens and with the one Nicoya-Kitty put up that makes 4 that i know of that spawn in wolver dens.
I don't know what scenario rooms are supposed to do, tell a story, hint at something, and/or just for content? but when ever you see out of place things like this it is usualy a scenario room. Just enjoy them when they come and then move on.

There's at least 4 that can show up in Wolver Dens that I've personally taken pics of. The pond one the OP has, Nicoya's wishing well, an abandoned camp, and a temple that appears on long horizontal sections. Of them the abandoned camp and the wishing well seem to be the rarest. The abandoned camp and temple ones aren't interactive like the other 2 are.
~Gwen

@ Gwenyvier The temple is the one where it's just the bigger version of the statue in their pictures right? I think i've seen a another one, it's an area that has 2 medium sized ponds on the sides, and there is a big puppy statue facing you in the center with 2 smaller ones in the front facing the big puppy that are behind a wall, there is space where you can walk between the pools and the wall off the puppys with trees in them, there are also some building behind this.
P.S. sorry if i explained it too much.

@Gwen
I saw this other one like a camp of sorts with a knight saying she(?) was training the recruits in the scenario room for the clockworks. The recruits themselves spouted random advice and stuff. One said this was his(?) first time in the clockworks. Hard to believe since we were in lower T2. HAAAAAXXXXXXXXXXXXXXX

Here is the thread created by Tantarian, where all info about Scenario Rooms are gathered. I believe it will serve in creating future wiki page. Do not hesitate to put there any findings.
BTW, Scenario Room mentioned by OP is already there as Scenario Room W-4.

@OP: Those rooms also appear in Lichen Lairs. Keep yer eyes opened. :)
I believe its called a wishing well and is a scenario room.
On that note, someone explain to me what each of the scenario rooms are supposed to do? I've looked around all the time for info, and can never find any.