As you may know by now, the whole area is littered with them. I took advantage of a couple of cool days to better explore two areas I had not before. The first was up on the hill behind the railway station, amid dense woodland. This was the location of an artillery observation tower and command post plus ancillary buildings. Modern building has encroached on the southern part of the site but, buried in the woods by the water tower, are the remains of several large structures. There’s a map showing them at http://www.forteresse-nord-medoc.org/bunkerologie.aspx
Not all are still there and some are too dangerous to enter, although not fenced off in any way.
To the north of town are the remains of several large complexes including radar stations, barracks and anti aircraft defences. Some of these are in remarkably good condition considering the years that have passed and the violent events that took place in April 1945.
The final liberation on April 20, 1945, was made after 7 days of fierce fighting, in which 380 French were killed and 843 wounded, 937 Germans killed and 3,300 taken prisoner.
My pictures – https://1drv.ms/f/s!Am0w7qp9HCpqhJh5fpg1FO-Q-CYe4A
Tom's Place - a sort of blog by a British resident of Albufeira 