Fremont Street is the “heart” of downtown Las Vegas. It’s actually in the city of Las Vegas; almost all of The Strip is south of the city line in the unincorporated community of Paradise. It’s where you’ll find a lot of the older, classic casinos like the Golden Nugget and El Cortez.
Some years ago, the city fathers saw that everyone was hanging out on The Strip, making the downtown area pretty much a ghost town. Something was needed to revive the area.
They closed off several blocks of Fremont Street in front of the casinos, turning it into a pedestrian mall. They covered it with a HUGE light display for hourly light and music shows, and set up three quasi-permanent performance stages (they look like they could be easily disassembled if the need arose). Street performers were allowed, within reasonable limits.
In effect, they turned it into the world’s largest open air nightclub.
So it’s the perfect place for public parties and festivities. Like Halloween.