There are a number of monster nests scattered about the various regions in The Witcher 3: Wild Hunt. They are often found close to abandoned sites and typically require the use of a bomb to destroy the nest (or nests) to stop the monsters from regenerating and allow the population to return. Bombs which do the trick are: Dancing star, Grapeshot and Samum.
White Orchard
- 3 locations
Pontar (Velen and Novigrad)
- 28 locations
Skellige
- 5 locations