Sleepy Hollow is the name given to a circular, shallow depression in Gusev Crater on Mars near the landing site of the Mars Exploration Rover "Spirit" in 2004.
About 12 meters from the landing site, Sleepy Hollow measures about 9 meters across.
The name is an allusion to the locale mentioned in Washington Irving's "The Legend of Sleepy Hollow" (which also gave its name to Sleepy Hollow, New York). According to a press conference, it also is the hollow where Spirit will sleep as it is checked before beginning to rove Mars.