As Ben Kabak posted earlier, its the 100th Anniversary of Grand Central Terminal, and with ongoing investment in transit access (East Side Access, 7 extension) and an upzoning, GCT continues to spur investment in the surrounding area.
After reading Ben's post and the comments I was inspired to do a little exploring at lunchtime.
It's amazing what you can walk by and over in this city without realizing it. I was surprised and delighted to learn that GCT had entrances at 48th and Park and on 47th between Park and Lex.
The NYT wrote about the entrances shortly after they opened in the 1900s:
Typos courtesy of my iPhone