Deep in the San Gabriel Mountains lies this curious a 120 foot high concrete bridge leading literally to nowhere. It was constructed in 1936 over a gap of the carved by the East Fork to connect the San Gabriel Valley and Wrightwood. However, two years later a massive flood changed the landscape and destroyed the road that lead to the bridge. The road was never rebuilt and construction was abandoned due to a lack of financial investment. It is the only place in California were bungee jumping is allowed.
This is a 10 mile roundtrip to hike here. You need a free Wilderness Permit to hike inside the Sheep Mountain Wilderness, which you can obtain at a ranger station or visitor center in the Angeles National Forest/San Gabriel Mountains National Monument or at a self-service registry at the trailhead.
If you hike in winter, be careful when crossing the streams as the water level is much higher than in the summer months. If you hike in summer, take plenty of water, since it will be very hot and dry. Do not hike, if the is a storm coming in, since it is a deadly area infamous for flash floods. This is a popular hike.