Vector's Lair is the main location of the Despicable Me franchise.
Vector lives in a lair with cameras and security weapons around his house. He is apparently proud of the place he lives and referred it as "Fortress of Vector-tude" when he greets to Margo and her sisters.
There is an enormous tank with a Vector's unidentified shark inside covered in strengthened glass. His home seems to be very high-tech and Vector can do anything with a special keyboard for security, like the scene when Gru tried to get into his turf to steal the Shrink Ray. Vector also seems to have a Nintendo Wii system which can be played on a arc screen in his living room.