Mononoke Hime, Made in Abyss Recommendations
Made in Abyss has a very "Ghibli" feel, with an eerie feeling, and a lush, rich world and deep characters and story. More mysterious than Princess Mononoke but if you like one you should check out the other.
The environement's details and creatures are very similar.
Global vibes are very similar: poetic, but dynamic.
Similarities: The mysteries of their worlds and the way they explore them in both, from the designs of; the creatures, the environments and even the characters. I mean, San's design obviously helped inspire the design of Nanachi, Ashikaga's curse to Regu's cyborg arms and even Lady Eboshi antagonistic beliefs to Ouzen's own antagonistic beliefs. Even the stories are alike; a tale of a journey to found something/someone (with Mononoke Hime, a cure for Ashikaga's curse and with Made in Abyss, Riko's mother).
Made in Abyss feels like a Ghibli movie that was written by a sadist.
Boasts an Art Director, Osamu Masayuma, who has worked on various Ghibli films too, so the art is just as fantastic and captivating.
Vivid and detailed natural environment, a setting organic to the plot mixing more down-to-earth elements with supernatural ones. Both anime play around with the more apathetic, dangerous and less softer aspects of nature.
Of course, one is a movie another a series, and the character designs of MiA are of the chibi style instead of the realistically proportioned Ghibli ones.