This multi-level track is my favorite of the first set. Note the front straight and adjacent pit straight, which are practically on bridges. A nightmare for engineering, but brilliant for spectating.
Imagine a wide panning shot over the track. Now I sound like the person that wrote the forum descriptions.
More importantly, note the chicane at the top right, which I would imagine as a sort of reverse Corkscrew.
Length sits at 4.68 mi./7.55 km.
All the ones after this have been edited with some accordance to comments. That will only increase with time.