Unfortunately, there is little to say about this modernized town. When it comes to charm, or monuments, or outrageous legends, it comes up short. During the busier periods along the camino the town feels overrun with pilgrims; most of whom are excited to have finished their penultimate day of walking.
Avoid the temptation of following the main road out of Pedrouzo. There are very few arrows to get you back to the camino and following along the road puts you in very real danger and takes you away from a lovely forest walk. See note below to get back to the camino.
If you spent the night in Arca, it is important to find your way back to the camino proper which runs through the forest to the north. To get to it, find the intersection of the main road and Calle de Condello (where the Casa do Concello is located). Continue uphill (north from here) and in a few hundred meters the camino presents itself. Turn left and continue through the forest to Amenal.
The camino between here and Santiago is a mixture of rural and urban settings, some forests and some sprawl. The up and downs that you have been experiencing continue: the elevation gain/loss is +308/-339m, a not insignificant amount.