Well, Aria opened in December 2009, and the Cosmopolitan in December 2010, but they were both new to us. Both properties are in City Center, next to the Bellagio.
The Aria has a contemporary, clean look. You are greeted at the entry by a wall of flowing water.
We had a nice lunch with great service at Caffe Vettro.
Later, we walked to the Cosmopolitan, which is also modern, but with lots of glitz and crystals as you enter.
Tomorrow, I share our dinner at a great wine bar/restaurant!