Witches' Kitchens
From NsdWiki
Witches Kitchens are small, natural caves with vented chimneys and hearths, and are usually located in forests and hilly regions. These places are where witches abide, though they move from place to place often, generally. They make for great shelter for adventurers, and seem perfectly suited for a wilderness hideout, unless the witches come home unexpectedly, of course...