EaterNY has a great article on 7 of the best, all be it unknown, ramen restaurants in NYC. The list includes the No Name Bar, Tsushima and the Brooklyn based Yuji Ramen.
From my experience in NYC I would also suggest trying Ramen Kuboya at 536 East 5th St between Avenue A and B and the always busy Ippudo NY at 65 4th Avenue between 9th and 10th St. Below are photos of the ramen dishes I tried at each location.
Ippudo NY Ramen Kuboya
Have you had a wonderful ramen meal abroad?