Here's the first new section as you walk north from 20th Street.
They've added a fair bit of new seating, and even managed to squeeze in a narrow lawn.
All along the way are new "spurs" which jut off the line, allowing for benches and side views.
There's a slightly raised "flyover bridge" connecting two sections (facing south here).
Another traffic viewing stage, similar to the one in the first section. This is the "26th St. Viewing Spur."
The terrain in the new section is much more industrial, so you get all sorts of great glimpses at urban architecture that was never meant to be seen, like ductwork and alleyways. 
Toward the northern end (it stops at 30th St. now), the line takes a gentle curve, which is hugged by a new wooden bench. (Facing north first, then south.)
Little building you'd never have noticed before become highlighted (one wonders what the neighbors will think when the crowds arrive.)
The plants carry on the same wild garden theme of the first part, to excellent effect.
At 30th Street, you can see a branch of the rails as they were before the park was renovated. This may or may not be done up if the final extension to 34th gets approved.
And all along, you get the same slightly-elevated street views that allow you to enjoy being a voyeur from above, yet don't feel intrusive because you're not in anyone's face. (I suppose if I had a zoom lens, I might have been.)
