Manhattanhenge alignment of the setting sun (Flatiron viewing point)

Manhattanhenge is a twice-yearly phenomenon when the setting sun aligns with Manhattan's street grid, producing intense lines of sunlight that appear to tunnel down cross streets. One of the most photographed viewing locations for this alignment is the area around the Flatiron Building on 23rd Street; observers gather on blocks near 175 Fifth Avenue to capture the effect. The dates and times of Manhattanhenge are predictable and published annually, and the event produces spectacular, unusual sunlight patterns across the cityscape.