Until 1900, Green Cheese was considered to be either "just an old mouldy piece of cheese" or one of the world's most sought after artefacts in history. The oldest known specimen is on display, safely sealed inside a protective scent-free case, in the National Cheese Museum in Whinnyapolis. It can be found in the Hall of Rare Cheeses, on the far right of the museum, opposite the second storey's centre corridor. By accessing it, you have to go up the stairs, through the Dairy Hall, up the stairs again, turn right, turn right again, walk sideways, dance a jig, and then head North.