I've driven around the Los Alcornocales Natural Park in Spain, it's one of the largest cork forests in the world. The road on the edge winds a lot and I had to

I've driven around the Los Alcornocales Natural Park in Spain, it's one of the largest cork forests in the world. The road on the edge winds a lot and I had to stop along the way from feeling queasy from all the bends which is unusual for me. I've also driven around Southern Portugal and from time to time would see a couple of trees with bark looking like a harvested cork tree. It must be fairly intensive to use these. I've noticed most Spanish and Portuguese wine bottles have real cork, I suspect most wineries have a specific supply of cork in the area.