This is a cache and dash at a section of the old road that was the A40 before the bypass was constructed. It is now an access road for the museum and a recycling place for bottles and clothes. Ample parking is available at the waypoint but it can get busy, it's best to keep geokids close.
Please note that there is no access from the very busy A40.
Please replace as found. Happy hunting, hwyl fawr 
.
Congratulations to ants tr7v8 on the FTF.