The Flower Fields are the domain of the Smiling Man.
At one point, Jeanette Cotton found herself there and described it as a field of endless flowers. She described the smell as overpowering, as well as a smell underneath, a smell of decay and "wet rot." She also mentioned that the flowers appeared to be rustling, as if something was moving. Eventually, she and Penny Balisong switched places due to the Flower Fields' influence.
Those who wander the Flower Fields long enough sometimes find a cabin that seems perfect in almost every way, with plenty of food and even a bed to sleep in. Some speculate that this, in addition to the peaceful appearance of the Fields, is to lure unwanted trespassers into a false sense of security.