At the bottom was a sunk fence; its sole separation from lonely fields: a winding walk, bordered with laurels and terminating in a giant horse-chestnut, circled at the base by a seat, led down to the fence. Here one could wander unseen.
– Charlotte Bronte
Jane Eyre, Chapter 23. The chestnut tree in Thornfield orchard is a symbol of the relationship between Rochester and Jane. Rochester will propose to Jane while sitting on the bench under the tree.