My Greenway Tours Private Adventure Tours in Porto Gerês Tour (National Park) Enjoy a day in Peneda Gerês National Park. Culture, tradition and adventure in the same tour in a magical mountain prize of Unesco World Heritage Porto Sierras Park The perfect tour to spend only 4h discovering important historical, geological, fauna and flora details about these Sierras. Douro Valley This area does not need presentation. Who have never heard about it? That's right! Take the chance to enjoy this amazing landscape in a unnique off-road experience.