The image is a photograph of a black sign with Chinese text written on it. The sign is located in a park or a wooded area with trees and bushes in the background. The text on the sign reads "Underground palace" and is written in both English and Chinese characters. Below the text, there is a description of the underground palace, which is the place of burying Duke and his wife. The palace is located on the right side of the image and is surrounded by a fence.