1. In 1859, a large gold discovery was made near Central City, Colorado. This led to the Pike's Peak Gold Rush and the settlement of numerous mining towns throughout the region.
2. On May 21, 1901, the first electric streetcar began service in the city of Denver. This transportation innovation revolutionized how people could travel around the city.
3. The Colorado National Monument was established on May 21, 1911. Located near Grand Junction, it features stunning red rock formations, canyons, and panoramic views of the surrounding landscape.
4. On May 21, 1961, astronaut Scott Carpenter became the second American to orbit the Earth. He was born and raised in Boulder, Colorado, and the town named a park in his honor.
5. In 1998, the Denver Broncos purchased the naming rights for their newly constructed football stadium, now known as Empower Field at Mile High, on May 21. It has since become an iconic landmark in the city and is home to numerous sports and entertainment events.