brook

A glade far enough North of Ponyville to be out of range of all magical detection.  As you enter you will notice the topography is that of a large bowl with a raised dome in the center.  At the bottom of the round trough created runs a small brook.  Most of the rim of the bowl is smooth but in the Northwest area, it becomes sharp and actually overhangs inside a bit creating an alcove, and on the Northeast, it breaks to allow the stream to exit.