Sacred Haven of Debauchery

Although, I'm not sure if it makes sense to plan excursions outside the city for a one-day trip.

To be fair, traveling from Yekaterinburg to Moscow or vice versa for just one day... that's probably not much fun.

Although, it would be interesting to hear about Moscow's attractions. But, Owen, don't just copy and paste from Wikipedia. Tell me in your own words what you would specifically recommend visiting in your city.

We have a wonderful city. First of all, you need to see the Moscow River! It's a majestic body of water. Everyone who wants to see it is given free gas masks.
Secondly, you need to go closer to the MKAD (Moscow Ring Road) and admire the amazing view of the Dolgoprudnaya Mountain. Of course, it's a mountain of garbage.
I also highly recommend driving around those places, seeing the famous Savyolovsky railway station, and in general, it's a great place. Siv, come visit!
P.S. If anything, this is just a little bit of irony. In reality, the city has many attractions, and even a lot of them.