Montes Recti is commonly known as the Straight Range. This little range of mountains is in the shape of a rectangle. They are about 55 miles long and 10 wide. The higher peaks reach up to 1 mile. Look for this peculiar stretch of mountains 2 days after first quarter. They are easily visible in small scopes.
Maupertuis (28 miles) is deformed, more square than circular and located in an upland area. It walls are probably about 1½ miles about the floor. The rough floor has ridges crossing it.