I stepped out of my hotel, under cover of an umbrella, and departed Cardiff by train for the short ride to Caerphilly Castle.
Covering a sprawling 30-acres, Caerphilly Castle is Wales' largest, and the second largest in the UK after Windsor Castle. The castle dominates the small town by the same name in which it's located.
Built in the late 13th century, it was the first to use concentric walls in Britain, and according to historian Allen Brown, it features “the most elaborate water defences in all of Britain.”
The castle grounds are no more than a five minute walk from the Caerphilly train station.
By the time I approached the main entrance, the clouds had parted, and a rainbow was arching it's way toward the moat.