Gravity Falls (2012)
IMDB link: IMDB
Synopsis: Gravity Falls is just west of weird, slightly east of eerie and always north of normal! City kids Dipper and Mabel Pines are sent to spend the summer with their eccentric Great Uncle Stan who runs a tourist trap in a remote northwestern town where nothing is what it seems. With creatures in the forest, monsters in the lake, and a portal potty in the woods, Dipper and Mabel quickly learn that they will have to rely on one another if they are going to survive the summer!