There’s no entrance.

Two men stand side by side at night, both exhaling large clouds of vapor from their mouths, with the man on the left producing a continuous, thick plume that drifts upward and to the left, while the man on the right exhales a smaller, more controlled cloud; they remain mostly stationary, occasionally shifting their weight or slightly adjusting their posture, against a backdrop of a dark, open area with distant streetlights and buildings.