Sherlock is a feature on Earth's Moon, a crater in Taurus-Littrow valley. Astronauts Eugene Cernan and Harrison Schmitt drove their rover to the north of it in 1972, on the Apollo 17 mission. Sherlock is about 1 km east of the Apollo 17 landing site. To the south of it is Steno crater and to the north are Van Serg and Shakespeare. (wikipedia entry)
A landing site name is a lunar feature at or near Apollo landing sites.