(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
The Chicago 
Architecture Foundation is hosting an architectural ..... A Serious Lawn Ornament 
...... for $60 apiece when the artist secretly set up a table in Central Park.