This is the 13867th most frequent Swedish word.
älvdalens
"Älvdalens" means "of Älvdalen," referring to something belonging to or associated with Älvdalen, a region or locality in Sweden.
Here, 'Älvdalens' modifies 'skönhet' to indicate that the beauty belongs to Älvdalen (possessive usage).
Älvdalens skönhet är oöverträffad i regionen.
The beauty of Älvdalen is unrivaled in the region.
'Älvdalens' attributes ownership: the valley belonging to Älvdalen (genitive case).
Vi planerar att besöka Älvdalens dal med våra vänner.
We are planning to visit the valley of Älvdalen with our friends.
In this case, 'Älvdalens' indicates that the folk music originates or is associated with Älvdalen (possessive usage).