Over the Garden Wall
@CartoonLibrary
Synopsis
Somewhere, lost in the clouded annals of history, lies a place that few have seen. A mysterious place called The Unknown... Two brothers, Wirt and Greg find themselves lost in the strange woods, adrift in a time. With the help of a shadowy woodsmen and a foul-tempered bluebird named Beatrice, they travel through the foggy land in hope of finding a way home.
(Source: IMDB)