Another "unknown" Gorge delight is
Cougar Rock.
Located on the north rim of Multnomah Basin, this 1,700'+ point is readily visible from the freeway just east of Multnomah Falls but rarely visited. (None of the maps of the area show there to be a trail - yet, there is one, if you know where to look!) Here's my daughter Suz trying to give her father a heart attack with some free solo moves. (Elevation of the freeway below is about 40 feet above sea level.)