So this Sunday should be interesting, I'm going on a hike that my cousin told me that her parents went on called: Bridge to nowhere in Azusa, CA.
There is is an isolated concrete bridge perched over the San Gabriel River leading neither from nor to any destination. It is a total of 9 mile hike round trip about 4 1/2 hour hike.
They say the most challenging think about the hike is to see how many times you can avoid water to cross to the other side...in other words you will get wet!
here's some other pics that I found on the sites for this trail, oh and some people even bungee jump on the bridge too!