The Boulevard Ring
The map of Moscow today is characterized by concentric rings, streets built over the former walls around the medieval town. The innermost ring (a triangle really) is the Kremlin wall. Then comes the Boulevard Ring, created in the 18th and 19th centuries, still has tree filled parks in some of the sections between the roadways. Intersections are sometimes named for gates that used to stand in the wall: Nikitsky Gates, Pokrovsky Gates. The middle ring, which defines the center of the city today, is called the Garden Ring, or Sadovaya St. Now there is also a ring highway around the outer rim of the city.
Unlike the other rings, the Boulevard Ring still has greenery and parks today:
Tverskoi Boulevard between Griboyedov and the statue of Timiryazev