Check out this cave-style door! This door is an entrance to a dwelling tucked away amidst sand-dunes and coconut palms on a beach in Kenya. It is owned by designer Marzia Chierichetti who also created this retreat. How fun!
LR window seat inspiration--but with thick cushion. (Note how backrest plane and then seat plane expand overall width without having to thicken the wall.) Napa Valley House by Steven Harris Architecture (Architect: Eliot Lee)
Now here is an idea for the wall you face from the entryway! Do a skylight in the hallway and then a living wall to accommodate many of your plants! There are systems to automate irrigation and allow for easy removal / swap-out of plants as it grows!