This is a free tram, which runs from Monte Carlo, City Center, Aria, and Bellagio. All of them are MGM own resort. I wish this tram could link to NYNY one can run all the way down to Mandalay Bay. The tram is very handy during hot day in Vegas, just aware the tram stop isn't indoor but there's shade. If you going to further casino like Venetian or Mirage, expect to walk another good 10, 15 minutes, or so.