Why we relax faster when our backs are covered
Think about why a bench placed in the middle of an open lawn almost never gets used, while an old kitchen chair wedged between the potting shed and a lilac bush becomes everyone's favorite reading spot. Geographer Jay Appleton described this as prospect-refuge theory: humans seek places where we can see out (prospect) without being exposed from behind (refuge).
At Carl Milles's terraced sculpture garden Millesgården on Lidingö, and in Ulla Molin's famous private garden in Höganäs, seating niches are carved into clipped green walls or nestled beside low stone retaining ledges. The enclosure only needs to reach 135 centimeters—roughly shoulder height when standing, but well above head height once you sit down.