An elevated view captures a densely developed hillside in Sveti Vlas, Bulgaria, under an overcast sky

An elevated view captures a densely developed hillside in Sveti Vlas, Bulgaria, under an overcast sky. In the immediate foreground, several flat rooftops feature multiple silver-colored solar thermal collectors. Directly behind these, a multi-story building with dark brown walls, numerous rectangular windows, and an extensive orange-red tiled roof with a white chimney is prominent. Two white external air conditioning units are visible on this building's exterior. The midground reveals a dense urban sprawl of residential buildings, many with orange-red tiled roofs and light-colored facades, conforming to the sloping terrain. Further up the hillside, in the background, numerous uniform white residential units with matching orange-red tiled roofs are constructed in terraced rows, ascending a sparsely vegetated, dark-toned slope. Near the crest of this slope, a Bulgarian flag, displaying horizontal white, green, and red stripes, flies from a flagpole. The uppermost portion of the hill and the sky are obscured by a pervasive grey haze or fog. No individuals or specific actions are visible within the frame.