Continue along the beach
From Create Your Own Story
The beach dwindles to almost nothing, but you go on until the shore has almost become a cliff. Soon it is clear that you cannot continue this way. But just as you are about to turn back, you notice a very small cave between two large rocks. Footsteps lead up to it. Interesting...
If you feel adventurous, you can enter the cave. If not, you can go back and take the path you saw earlier.