A rare total solar eclipse began in the Western state of Oregon Monday, as millions of people across the U.S. are watching the phenomenon from the Pacific to the Atlantic for the first time in 99 years.
Millions Across US Marvel at Total Solar Eclipse

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Jesus Ibanez was among hundreds of observers of the partial solar eclipse outside Griffith Observatory in Los Angeles, Aug. 21, 2017.

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A total solar eclipse is seen above the Bald Knob Cross of Peace, Aug. 21, 2017, in Alto Pass, Ilinois.

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People watch the solar eclipse from the observation deck of The Empire State Building in New York City, Aug. 21, 2017.

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The Isle of Palms beach in South Carolina, turns dark during the solar eclipse, Aug. 21, 2017.