Sen to Chihiro no Kamikakushi, Made in Abyss Recommendations
Very similar feel in that they both feel like you have stepped into the spirit world. With a lush world of amazing art, and incredible character and strange creatures. You definitely feel transported away in both works. Made in Abyss has a very "Ghibli" feel to it too.
The environement's details and creatures are very similar.
The main duo work the same way.
Global vibes are very similar: poetic, but dynamic.