That sculpure, the where, reminds me of Kang and Kodos. The flesh eating aliens. From wiki:

“In the episode "The Man Who Came to Be Dinner", Kang and Kodos have one of their few canon appearances. The Simpsons end up on Rigel VII where Kang and Kodos give them a tour and a brief look at their lifecycle before placing them in a zoo with one of them, Homer, to be eaten in a yearly ritual. But after it is revealed that human consumption is fatal to their kind due to their unhealthy diet, their queen killed as a result, the Rigellans send the Simpsons back to Earth.[15]“