Lester's is a possum-themed theme park in A Goofy Movie.
The park is located in a forest. It does not seem to be a popular place, as a girl (who appears to be of toddler age) with missing teeth is afraid to do things there. The archway, which is the entryway, leads to the Main Quandrant where the Welcome Show and Photo Booth are located. There are also other attractions which are not explored.
A Goofy Movie
As Goofy and Max pull into the parking lot, Goofy exclaims "Gwarsh! It's even better than I remembered," implying that the former had been there once before during his childhood. The latter shows no interest in attending before being dragged along by his father.
In Darkwing Duck: The Definitively Dangerous Edition, as a way of tying A Goofy Movie (and by extension, Goof Troop) together with Darkwing Duck, Gosalyn mentions Lester's Possum Park, saying that Darkwing stumbled onto F.O.W.L.'s current hideout while taking her on a trip there.