Big Man Who Built a Forest
Nils climbs a tower to avoid the rain, but he's not alone. As he's hiding, one of the humans tells a story to pass the time... Source: crunchyroll
Aired 23/12/1980EP 42 - Big Man Who Built a Forest

The Wonderful Adventures of Nils Holgersson
Nils is a lazy and greedy boy whose mischief makes everyone miserable, whether it's his parents, the animals on his farm, or the fairy-like tomte he captures one day. But he gets his comeuppance when the pint-sized tomte casts a spell to make Nils just as tiny as him! The only way to break the spell is to go on a journey to distant Lapland with Morten the farm goose, Carrot the hamster, and a flock of wild geese.
Along the way, he contends with cruel witches, talking statues, wise ravens, and one very persistent fox. Under the guidance of the stern but caring Captain Akka, leader of the flock, Nils discovers his kind heart and his love for nature. But when the time comes, will he be able to choose between his human family and his feathered friends?
(Source: Discotek Media)