The Turtle Lair is the home of the Ninja Turtles and their father, Master Splinter. The lair is located underground, beneath New York City, and is accessed via the sewer tunnels. It appears in the Turtles of Grayskull comic series.
The lair is a large space with brick walls and pipes that run overhead. It is furnished with an assortment of furniture, including a couch and lamps. On at least one wall there is an emergency light. After the Turtles are accidently transported to Eternia, Splinter is left alone in the lair, though he is visited by April O'Neil.