Chicagohenge

Twice each year—within a few days of the spring and fall equinoxes—the setting sun aligns with Chicago’s grid street system, providing a simple, but remarkable visual phenomenon. The setting sun can be seen between skyscrapers from any east-west street downtown for about ten days each spring and fall, but near-perfect alignment occurs on just two evenings each year. The exact dates and peak viewing times vary slightly from year to year.

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