Hi Stu,
You might consider getting off the bus at Valenca de Minho which was the old Portuguese frontier and then walking across the river Minho to Tui in Spain on the 19th century bridge designed by Eiffel of Paris tower fame. On the bridge the river view towards Tui and the cathedral is splendid!
Be sure you have good wet weather gear! In December 2011 after finishing the
Camino Frances I continued to Finisterre, per usual, and then walked down to the border at Tui/Valenca de Minho. The weather was cold and very WET; often I was the only pilgrim. However, all the Galician xunta albergues were GREAT with welcome heat, good showers and handy pilgrim kitchens.
Stay dry and Buen Camino,
Margaret Meredith