Monster nest

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
 * 1 east of the Crossroads
 * 1 east of Cackler Bridge
 * 1 north of the cemetery

Pontar (Velen and Novigrad)

 * 28 locations
 * 1 at Hindhold
 * 1 by the abandoned huts about halfway along the road between the bridges north of the Border Post and Hindhold (rotfiends)
 * 1 on the small island in Lake Wyndamer, northeast of Olena's Grove and northwest of Road to Bald Mountain (drowners)
 * 2 southwest of Miller's Lake, in the fields (nekkers)
 * 1 southwest of the Garin Estate grounds, in the forst just west of the fast travel marker]] (arachnomorphs)
 * 1 at the end of the road north of Sarrasin Grange

Skellige

 * 5 locations
 * 1 near where Geralt washes ashore on Ard Skellig (sirens)
 * 1 along the shore, south of the Crossroads (drowners)
 * 1 at Fort Grymmdjarr (harpies)
 * 1 at Ruined Inn (sirens and an ekhidna)
 * 1 north-northwest of the Bay of Winds (cyclops)

Toussaint

 * 8 locations
 * South of the flooded ruins of the Valley of the Nine (archespores).
 * At Rioux-Cannes Outpost (20+150 harpy ×3, Samuel Eide's notes).
 * South of Dun Tynne Castle in woods via cave (100, kikimore).
 * Written oath, Diagram: Toussaint Ducal Guardsman's steel sword on body.
 * Northeast of Basane Farm (20+41, forktail).
 * Southwest of Toussaint Prison (100+4, archespore ×2).
 * Leather-bound journal on body.
 * North of Tesham Mutna Ruins (20+34, giant centipede ×2).
 * Love letter from Bella de Gunness on body.
 * East of North of Corvo Bianco Vineyard (20+4, archespore ×2).
 * Letter to a father on body.
 * Southeast of Francollarts (20+4, giant centipede ×2).
 * List bearing Belgaard's seal on body

Monsternest Nid de monstres Tana di mostri Gniazdo potworów