Las Vegas Convention Center
Always hosting one thing or the other, the Las vegas Convention center, in the traditional red brick that populates the city, is one of the landmarks and largest convention centers in the world. The parking lot alone is massive and daunting for a city built on tourism and there's a convention of some sort always being advertised and causing people to come step foot through it's front doors. From stately palms, Domed main building to the seemingly perpetual present small white open sided tents hawking admission for this and that, it's almost as busy as the strip at times and a good place to people watch.
Or pick pockets.
