The Braes of Fowlis are rough and heathered, and are on the north side of the former Keillour Forest, which is a strange, glaciated, riverless valley which is right on the geological boundary between the highlands and the central lowlands.
When visiting this area, we didn't bother visiting the standing stones just west of Fowlis Wester village. I've just checked out the Ancient Scotland site (see links) and I now realise that we certainly should have!
Ancient Scotland describes 3 megaliths, one of them a 15 by 15 foot monster. I think I'll be back here. (and I'll get better photos to replace the blurred ones I posted)
There are also pictish stones, cairns and cup and ring marked rocks in the area.
I cant get a direct link to the Fowlis Wester section - go to the 'megaliths' tab, then it is on the menu list if you have a close look. Good photos and info.
As BigSweetie has said, there's a lot going on here. Many of the stones are field clearance, but the cist covers and several recumbent stones (along with the single upright remaining) show that there was a veritable hive of neolithic activity here at one time.
According to a local lady I spoke to, the land belongs to the Abercairney Estate and was at one time used as a burial ground. The estate has been held by the Moray family since the end of the 13th century.
Grinsell notes that just west of the stone circles used to be the Moor of Ardoch Sithean. A sithean is a fairy knowe, or cairn. Clearly the fairies didn't hold much fear for the people who destroyed it.
(mentioned in Grinsell's 'Folklore of Prehistoric Sites in Britain')