(Jon of the Clue Crew walks on the grass in Central Park.)  The area that's hosted a mass by Pope John Paul II and a concert by Simon & Garfunkel has been called the "Great" this since it was planted with grass in 1937
... every summer the area just north of 
Belvedere castle has been the stage for acts as diverse as Simon and Garfunkel 
and Pope John Paul II.