Very nice!
I also just had a couple of weeks off because the place I work was shut down for a while. It was actually only shut down for about a week, but it was also so slow at this time of year that I was able to take some extra time off.
I didn't go on any adventures quite as great as yours, but I did take the opportunity of both time off from work and better-than-usual weather in my area to go on some pretty long walks with my dog, mostly near our home, but including a nice secluded river parkway.
RE: Cwm Prysor Viaduct