The entrance to a subway station with normal concrete stairs descending underground, but at the bottom the staircase goes directly into crystal-clear turquoise water — the last four steps already submerged, teal water lapping gently at the third step from the bottom, colorful tropical fish visible swimming through the flooded tunnel below, someone has taped a handwritten sign saying NO DIVING to the railing, normal city street and pedestrians above, bright daylight, 8k