Finally we paid a visit to MoMA, the Museum of Modern Arts, located on 53rd Street, betw. 5-6th Ave in Manhattan. Established in 1929 it exhibits works of Picasso, van Gogh, Dali, Warhol, Gaugin, Monet, Matisse and Frida.
It's big so take your time for it, but it's definitely worth a visit, I enjoyed it even though modern art is not really my favourite, but on 6 floors everyone finds something interesting.