The cache is just 5 minutes walk from the top of the Peak Tram. Go past the little temple-like lookout spot to the east of the Peak Tower, along a wide, paved path called Finlay Road that winds through the forest. At the junction with Plantation Road the forest opens out to give you the famous harbour view, minus the crowds. Ahhh, a bit of peace. This junction is the GZ. From here you can walk down through the forest from the Peak and back to Central, or catch the Peak Tram at a lower station if you like.