It ran down Fourth Avenue from the north and ended at their depot on 27th St. Initially, the trains were drawn by a team of horses. read more
Then, after pressure from the city, he moved the uptown train tracks underground and this part of Fourth Ave also became Park Avenue. It wasn't until 1902, when the Pennsylvania Railroad acquired the right to come into New York City that the uptown Park Avenue became a desirable place to live though. read more
Fourth Avenue is actually one of the oldest avenues in Manhattan. It even predates the grid pattern that the rest of the city is laid out on. It is a remnant of the old Bowery Road, a colonial path that was first laid out by the Native Americans. read more
There is a 4th Avenue in Manhattan. It is a very short avenue, however: only 6 blocks long. It runs from Astor Place/Cooper Square (East 8th Street) to Union Square (East 14th Street). read more