Treasure hunting

The old oak
What a lovely day to do some exploring. Maybe you'll find something interesting? You're just following a random path when it suddenly splits in three by an old oak. You stop to ponder on your choices. You could have a nice stroll around the lake, there is a small boat over there. But the path over the plains seems refreshing and you see a strange rock out in the field. The path into the forest also calls to you. Looking hard, you see an old mossy well in between the trees. Does somebody live there?
Do you want to go to the boat, the strange rock or the mossy well?