The central bulge of the Milky Way in Sagittarius. In the bottom left half of the picture you can find the famous "Teapot" asterism (slightly cut of on the bottom). It is the northern end of a much larger constellation: Sagittarius.
Numerous bright nebulae and star clusters dot this part of our galaxy. When we look in this direction from our location on one of the outer arms of the Milky Way, we see the dust clouds that obsure the center of the galaxy.
The bright red nebula in the center of the picture is M8, the Lagoon Nebula. Above it (barely visible in this picture) is M20, the Trifid Nebula.