there are also sunken ships on the shore with loot.

as for holes, fill them back in is a thing. You can go all in if its at your home, or just casually patch it a bit if its a path you will use again, enough so its no risk, or put up a wall works too. You can even just put floor tiles over it.

if its a MP server, you can put deeskin rug over it to troll your friends.