This was my favourite WHS on the Iberian Peninsular. The churches and their locations were spectacular, and the interior frescoes stunningly beautiful.
I started out from Poble de Segur and took the bus to Barruera via Pont de Suert. This bus arrived in time to catch the Traginer, a local minibus that visits the villages of Taull, Boi and Val de Erill. In the course of a day I visited the four churches in those villages, thanks to the driver of the Traginer who allowed me to get on and off at will. Finally I visited the church of St Feliu in Barruera before catching the bus back to Poble de Segur.