High Quality Content by WIKIPEDIA articles! A man cave, sometimes a mantuary or manspace, is a male sanctuary, such as a specially equipped garage, spare bedroom, media room, den, or basement. It is not a cave but rather a metaphor describing a room inside the house, such as the basement or garage or attic or office, or outside the house such as a wood shed or tool room, where "guys can do as they please" without fear of upsetting any female sensibility about house decor or design. Paula Aymer of Tufts University calls it the "last bastion of masculinity".