I have found several planks of driftwood(ha) with hidden messages carved into them. Sequences of numbers, a time(10:08), love messages, valve jokes, emoji, and a couple more.

I've noticed that those colored rocks on the beach sometimes glow. Is this just to indicate them to collectors?

In that area with the wooden planks and sets of multitools and airbrushes, there is a plank of wood. At first sight, it looks like driftwood, but it is in fact a sign saying that the beach is dangerous and has been closed.

There is a caved-in cavern at the end of a path past a blank sign. Next to it is an iron giant toy.

I've found a couple others, like another vive pod in the distance and several yellow/orange pods having washed up on the shore.

Has anyone else found these?