After you find this cache, wander down the gravel road and check out the riverbank at this crossing of the Guadalupe River.
There is a little park nearby just on the other side of some old metal fence posts.
However, this park belongs to a RV/camping spot just up the road, so I wouldn't advise going in there unless you want to bump into the manager who may try to collect a daily usage fee.
The views up and down the river from the area outside of the park are fantastic.
Bring your own pen.
San Antonio Area Geocachers