The Heaviest Corner on Earth is located at the heart of downtown Birmingham, where 1st Avenue North intersects 20th Street North. It is surrounded by a number of imposing buildings. Whether this corner actually weighs more than any other is hard to verify (maybe impossible), but there’s an interesting history as to how the intersection came by its nickname. In 1911, Jemison Magazine published an article entitled “Birmingham to Have the Heaviest Corner in the South,” based on the completion of the four buildings surrounding the intersection of 20th Street…