To the west of these peaks is the sinuous Rima Hadley rille. This is the largest sinuous rille on the Moon. Four small craters near this rille have been assigned names by the IAU. Rima Ariadaeus is a linear rille on the Moon at . Also to the west is the Rima Birt rille. These features are lunar rille systems. The rille has been the subject of numerous transient lunar phenomena observations. The origins of this rille are believed to be volcanic. Moving on, they traveled to the rille. On EVA-1 they would travel to the base of Hadley Delta via the Rille. The eastern part of this area is notable for a series of rille systems. He was unable to see the Rille, something that had been possible in the simulators. Hyginus rille, possibly as an alternative Apollo 19 landing site. The circular patch features stylized red, white and blue birds flying over Hadley Rille.