Might be a dumb question but I am curious and never have the time

Where does this lead to? I am always so curious but I have never had the chance to check it out. This is track 113 in Grand Central. I typically always walk up the ramp/stairs but so many people go down this way.

Where does this lead to? I am always so curious but I have never had the chance to check it out. This is track 113 in Grand Central. I typically always walk up the ramp/stairs but so many people go down this way.