The dimples of Venus (aka back dimples, butt dimples) are sagittally symmetrical indentations sometimes visible on the human lower back, just superior to the gluteal cleft. They are directly superficial to the two sacroiliac joints, the sites where the sacrum attaches to the ilium of the pelvis.

Cousin's Reunion
Playing With Her Wand
Fit girl with a beautiful ass squats deep on a big cock
Fucking a stranger on holiday
Brunette in white stockings got fucked in reverse cowgirl pose
Pll pool Lolly loo
putting on a good show
Sexy Camgirl
Not the most definitive example of DoV, but beautiful nonetheless.
Just a lil bit dimply
Simply Dimples
Dimple reveal and jiggle
Letting the machine slowly take her anal virginity