It also helps to see some of these modern artworks in person. Rothkos are huge! And seeing the thickness of the paint on a Pollock really adds to it.
If you want to experience the great works of classical literature, you can get them from any library in the world. If you want to experience the great works of classical music you can again pick up a CD at your local library, and most mid sized cities in the world have halfway decent symphonic orchestra with a rotating reportoar. If you want to experience the great works of art you have to jet set off to a dozen+ cities around the world.
Also, sorry, but *repertoire.