How to make an apartment more "green", nature-connected without using plants?

EDIT: Thank you for all the awesome ideas! I'll need to do some crafting and looking for natural materials outside. Plants might happen again someday, when I'm ready to commit to them - then I'll get the pothos or similarly strong ones. :)

I have basically the opposite of a green thumb. Entrust me with a plant, and it will probably meet its end in a few weeks. Even survive-almost-anything succulents and ivy plants don't stand a chance. But I actually love nature and the idea of green witchcraft.

What are some ideas for making my apartment look & feel more nature-connected (cottagecore comes to mind), other than plants? TY!