Winter Surf Hits Canal Lock Wall at Twilight

Deep shadow envelopes the concrete sea wall of a canal lock chamber in Portugal, where late summer heat shimmer lifts from sun-struck surfaces nearby. A sharp rim light outlines the jagged edge of the structure against the darkening sky. Churning winter surf crashes against the engineered barrier, sending white foam high into the air. Strong leading lines of the lock walls guide toward the turbulent water. The rough texture of the weathered concrete contrasts with the smooth, dark water. One droplet of spray hangs suspended on the edge of a metal railing, catching the last faint glow of the day.