1. On October 15, 1971, the University of Nevada, Las Vegas (UNLV) officially opened. The university's first classes were held in various buildings throughout the city until its main campus was completed in 1972.

2. The Hoover Dam, located on the Nevada-Arizona border, was dedicated on October 15, 1935. At the time, the Hoover Dam was the largest concrete structure ever built, and it remains an impressive feat of engineering to this day.

3. On October 15, 2001, the City of Reno unveiled the "Believe" sculpture. The 22-foot tall sculpture, which spells out the word "Believe" in big, block letters, has become an iconic symbol of Reno and a popular backdrop for photos.

4. In 1910, the Tonopah and Tidewater Railroad was completed, connecting the Nevada mining town of Goldfield with the California cities of Los Angeles and San Francisco. The railroad played a critical role in transporting people and materials during World War II, and its tracks are still in use today.

5. On October 15, 1946, Las Vegas officially became a city. At the time, the population of Las Vegas was just over 8,000 people, but the city's growth exploded in the following decades with the rise of the casino and tourism industries. Today, Las Vegas is one of the largest and most popular cities in the United States.