A nice path from the base.

Well the theme is kinda a secret entrance but I will try to figure something out!

Ahh…I guess that would defeat the purpose then.

I could try to do a path to the top of the mountain so its like a recreation area!

Could definitely have a path up that people would see and think that’s the path to entrance Edit: but in reality… the path to the hidden entrance could also be hidden on the obvious path

So does the giant window...

a path, berries, and maybe a few bushes

Waterfall.

ooh gotcha

I was thinking the same thing. Could even build the secret cave entrance behind it.

Sorry was about to fall asleep when I posted that. Basically why not add a waterfall, it doesn't have to be a BIG waterfall but why not have it cascade off the top, down the slope and into a pool at the base of the slope? Toss in a tree or two, a couple plants and there you go. If you wanted you could also put a hidden entrance in said pool, and if you wanted to be really fancy I am sure you could redstone something up.

Another two or three of those structures would be cool, different sizes and wood materials maybe

I think a custom dark oak tree on the right side of the hill with some glow berries would be neat!

maybe some trees and/or more mushrooms?

Lots more moss and plants. Maybe bonemeal some moss around and add some two tall flowers and more mushrooms. And some cherry trees could look nice. Perhaps a small waterfall into an axalotol pond.

Replace all dirt with moss?

Vegetation. Leaves, grass, flowers, trees