STARHENGE is an interactive public artwork and observatory proposed for Flagstaff, Arizona—the world's first International Dark Sky City.

Designed by artist S.D. Nelson and astronomer Christian Luginbuhl, it is based upon a multicultural tradition of stone observatories found throughout the world. As an astronomical observatory, the stones of the monument will offer profound experiences of connection to the sun, moon and stars.

STARHENGE is proposed for Buffalo Park on McMillan Mesa, a broad, flat lava flow that bisects the city. The design will meld naturally into its environment, utilizing natural materials and native plants. It will appear to have been on the mesa for millennia.