Boatmakers' Hut is a small abandoned site southeast of Crow's Perch and is currently overrun by ghouls. After liberating it, villagers will re-populate the area and a merchant arrives with them as well.
Geralt receives 120
and 50 
for liberating the site, in addition to 20 for destroying the monster nest, and a possible 75 for killings its "boss" monster.