Gandalf took no notice of them. He sat with his head bowed, either in despair or in anxious thought. The mournful sound of the wolves was heard again. The ripples on the water grew and came closer; some were already lapping on the shore.
With a suddenness that startled them all the wizard sprang to his feet. He was laughing. "I have it! he cried. "Of course, of course! Absurdly simple, like most riddles when you see the answer."
Picking up his staff he stood before the rock and said in a clear voice: Mellon!
The star shone out briefly and faded again. Then silently a great doorway was outlined, though not a crack or joint had been visible before. Slowly it divided in the middle and swung outwards inch by inch, until both doors lay back against the wall.
DO NOT ATTEMPT THIS CACHE FROM THE HIGHWAY. Go down to the beach and look for the tunnel entrance using the associated waypoint for trailhead: N 37° 00.269 W 122° 11.112.
You'll need a flashlight and you should be prepared to wade through water in the tunnel. Water was ankle-deep when I placed the cache.
The cache is about six feet above the base of the creek. When you exit the "mines", search the base of the tree up and to your immediate left.
Enjoy! And happy caching!
50sumtin