'Marianas' was a shanty town at Carcavelos controlled by drug dealers. The surrounded area was allways full of junkies; you could easily see them on the road sides shooting heroin, if you were driving by, which was not a good idea at night. This was a dangerous place even for the police.
It took many years before the thousands of immigrants who lived there were relocated at different places according to a special program and houses and barracks were torn down a couple of years ago. This is all you see now.
New buildings will soon grow like mushrooms as roads are allready done and trees have been planted in the area, but in the meanwhile it's nice to see this space building free now.