Times Square Mural is a massive artwork by Roy Lichtenstein that is installed in the 42nd Street Subway. It's 6 feet tall and 53 feet long. If you're a fan of his work, tere's also another enormous Roy Lichtenstein artwork on 7th Avenue around 51st Street installed in the lobby of the AXA - Equitable building. There's actually a lot of public artwork installed all over New York City. You could spend a whole day looking at it all for free. I ought to develop a free artwork tour of New York City. I could charge $20 a person. Of course there are plenty of museums that have great collections and if you know when to go, you can get in for free or next to nothing. Friday night at MoMA and the Whitney are Pay What You Want nights and you can go to the Metropolitan as their admission is a suggested donation at all times. If you don't mind getting a dirty look from the person who sits behind the counter you can give them a nickle or a dime or whatever you think is appropriate. The Guggenheim doesn't offer any sort of discount ever. Some smart corporation that appreciates art ought to sponsor a free Thursday or Friday night at the Guggenheim.
It's really hard to believe that nearly a half a million people come through the 42nd Street subway station every day. That's a lot of people.