High, on the lonely edge of the Mariner Valley, near the site of the Mariner Valley Incident, on the surface of Mars, stands The Bell of Remembrance, a large, bronze sculpture commissioned to mark the 100th anniversary of the Incident in GSC 116.  The Mariner valley incident was a major event in the early history of the Tardigrades, and many Tardigrades make a pilgrimage to the site.