Wales, in my experience, is a principality that lends itself to travel in an east-west direction: the main road and rail corridors slice from the English border to the Irish Sea, following the lines of least resistance.
From the point of view of an outdoor challenge, then, it follows that a north-south journey is likely to be more challenging and, in the view of most hikers, more rewarding.
At 60 miles long, it is not too daunting a prospect: serious walkers could tackle it in a long weekend.
Looking across at Cardigan Island is a good way to mark the start of the proper walking, with Pembrokeshire across the estuary and a fine coastline ahead.
A short way inland you stumble upon a corner of Costa Rica that is forever Wales in the shape of the Felinwynt Rainforest and Butterfly Centre.