The Peneda-Gerês National Park is a stunningly beautiful wilderness of rugged granite mountains mixed with forest and fields of flowers. Lower lying areas offer conifer and broadleaved forests including some rare native woodland that contain oaks. Portugal's only National Park covers a 70,000 metric acres. The striking mountains reach 15,00 meters in rough granite. Here you will find the only surviving, untouched Roman road, complete with markers, on the Peninsula, and wild Gerês horses, roaming the wilderness. The spa town of Gerês offers water that is like silk, and renews you at first touch. Ancient villages fill the northern part, with a lake built around a sunken town. 
http://portal.icnb.pt/ICNPortal/vPT2007-AP-Geres