When I first entered the stadium I was on the main level which you can access the 100 or 200 sections. The pic that I took was on the last row of the last section on the 1b corner in the 200's. There was no way I can go up to the third level from the 200's. Like I said, I don't know anything about the 300's because I didn't even attempt to go up the ramp. All I know is that The Lower Level and Second Level (100's and 200's) are on the same level, and are both easily accessible by either walking down the stairs, or up them.
Parks I've been to- RYS, NYS, Shea, Citi, CBP, Fenway,Dodger, At&T, Oakland, Nationals, Wrigley, US Cellular and Target Field.