Praia Fluvial do Taboão - Festival Paredes De Coura is one noteworthy place to stop while you're exploring Rubiães and the surrounding area.
If you're spending some time in Lindoso, Parque Nacional da Peneda-Geres is a top sight worth visiting.
Lapa might not have many top sights, but Lagoas de Beritandos e São Pedro d’Arcos and Ponte de Lima Bridge are two attractions nearby that you can check out.
You might consider checking out Torre do Relogio de Caminha while you're exploring Pedras Frias and the larger Dem area.