A residential retreat is a place where people can go to relax and get away from the hustle and bustle of everyday life. The term 'DEN' is often used to describe a private room or area in a home, usually used for relaxation or leisure activities. A residential retreat is a type of DEN that is located away from the home, typically in a rural or natural setting. It is a place where people can go to escape the stresses of everyday life and enjoy some peace and quiet.