Good views of the thousands of people streaming into or out of Penn Station during rush hour, and possibly a bit overwhelming if you're visiting.
Note that since Madison Square Garden is built on top of Penn Station that's the reason you can't actually see anything that looks like a station. If you look around though there are loads of photos of famous sporting events and concerts all around the outside of the Garden, and if you actually go down the escalators it sort of does look like a station.
Cache shouldn't be too hard to find but the area is super crowded during the day so just something to keep in mind. Well, on the other hand it may be somewhat hard to find now that I think of it.
Also note that for the pedantic among us it's Penn Station. Stations are where trains stop and then keep going, whereas terminals are where trains end. So there's actually no such place at Penn, uh, Terminal, and therefore, uh, nobody calls it that.
Note that you'll need your own pen to sign the log.
Also note that this is sort of the exact opposite of its "sister cache" It's a Terminal, Not a Station (GC7VRV5), sort of, which did come first. Which may explain the more stilted parts of this cache description.
Started out life as a large magnetic key case. Then transitioned to a small magnetic key case. Then enjoyed life as a magnetic micro which unfortunately lost its magnet. If it gets any smaller it may as well be invisible, although it actually has gotten a bit larger now but it's basically become more invisible.
Note that the area apparently now has gates they close at night so no longer open 24/7.