The Museum of Digital Land Art can be found in the No Man’s Sky gameworld close to the centre of the universe. It is located on the solar system of “Really dead” (near the Taco system) on the planet Runessan Omega. These solar systems lie in the Sigardh Sector. I played in survival modus. (Disclaimer: The surface may have been restored to its original shape upon arrival, causing some buildings to partially disappear into the landscape.)
Take a picture on the site with your avatar and I will post it here.