Today I walked the avenues east of 1st Avenue. That includes York Avenue on the Upper East Side and Avenues A, B, C and D on the Lower East Side / East Village, about 7 miles in all.
York Avenue runs from E 92nd St. to E 53rd St. and was originally known as Avenue A, but changed it's name in 1928 in honor of WWI Medal of Honor recipient, Sgt. Alvin York. It's lined with expensive apartments and homes. That's pretty much it.
Further south, Avenues A, B, C and D run from Houston St. to E 14th St, creating the eastern half of the East Village neighborhood known as Alphabet City. These avenues continue south of Houston St. through the Lower East Side, but by different names (Essex, Rutgers, Clinton, Pitt, Montgomery, and Columbia).
Here are the pictures.