A forgotten dam and waterfall in a very public area. It's amazing how something so unique can be tucked away so well. A VERY short walk from where you park your car, check out this cool urban abandoned dam.
Once you get off on Poway road, turn right onto Sabre Springs Parkway. Take your immediate left onto Creekbridge Road and park right there on the hill. Walk straight down towards the black gate and go down the hill. Turn right on the trail and walk down 1/4 mile to the dam, and another 500 yards to the waterfall! You will see a tiny break off to the left that leads to the dam. Hop up on the wall and check out the scenery. Hang out, or walk to the other side for some fishing. Continue down past the double tubes onto the trail, and you will see a awesome hidden waterfall! Climb up the left side of the waterfall to get up to it.
This area is great for pictures! If you have a DSLR, try to shoot at 1/4- 1/6 of a second to freeze the waterfall, it looks pretty cool! Continue up to the top and your back on the bike trail, and a short walk back to your car.