Boulder is home to the University of Colorado, which has 15 alumni who have become astronauts in NASA's space program.
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Boulder, Colorado is famous for the Flatiron rock formations that overlook the town. The Flatiron Mountains were named by the pioneer women who said they looked like the flat, metal irons they used to iron their clothes.
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The world's largest natural hot springs pool located in Glenwood Springs. The two-block long pool is across the street from the historic Hotel Colorado, a favorite stop of former president Teddy Roosevelt.