This is a street of extremes. On one side you have a handful of utterly unremarkable structures, while on the other you have the imposing, history, and record-breaking James Farley Post Office building. Taking up two entire blocks, the city's largest post office claims to have one of the longest rows of Corinthian colonnade in the world – though I've found some sources that claim otherwise. Either way, it's an impressive building. Built by the same architects who designed the original Penn Station, which sat across 8th Avenue, it was intended to be as imposing and beautiful as the original train station. Now days, it isn't even a contest as it faces the utterly pathetic Madison Square Garden. 

While the 8th Avenue facade is the most visible and impressive front of the landmark, the longer sides which sit between this street and 33rd are something to behold. While the western side of the building is lined with loading docks, as you move eastward, it's taken over by an impressively strange dry moat, which acts as a barrier between the sidewalk and the building. I wasn't able to get a good shot of it, but Wikipedia has a nice view from 33rd St. 

The southern half of the block wouldn't even pass as impressive on a block without an 8-acre masterpiece facing it. So you'll pardon me if I didn't pay it much bother as I walked around here.