George B. Dorr considered the area around Sieur de Monts Spring to be the heart of Acadia National Park. He had purchased this area in 1909 to prevent a commercial water bottling facility from being built there. It was therefore a fitting location for a plaque to honor the many years he spent expanding and advocating for the park. The memorial plaque can be found on the south side of the Nature Center. The inscription reads as follows: