A white windmill beacon on a waterfront under a clear blue sky with a faint rainbow arching overhead.

The main subject is a distinctive, white, tower-like beacon structure shaped like a windmill, known as the Mühlenbake in Świnoujście, Poland. It stands prominently on the right side of the frame, featuring a white cylindrical body with a dark base and a distinctive set of white lattice-style arms. The structure is set against a vibrant, clear deep-blue sky that dominates the background.

To the left of the beacon, a faint, translucent rainbow arches across the expanse of the sky, adding a gentle curve to the composition. The foreground is defined by a simple, paved waterfront area that stretches toward the horizon, where the calm, deep-blue water of the sea meets the clear sky. The overall lighting is bright and sunny, highlighting the clean white facade of the landmark.

This is a photographic image with sharp focus and high contrast between the stark white architecture and the vivid blue environment. The composition is clean and minimalist, drawing the eye directly to the unique architectural form of the windmill-beacon against the wide-open coastal backdrop.