This is the home of the billionaire Bruce Wayne, who's parents died when he was 8 years old. He inherited the large mansion after his parents' death and lives here with his entrusted butler, Alfred Pennyworth.
The Batcave is not know to many heroes, since Batman is a very good secret keeper. Only one other besides Batman's butler Alfred Pennyworth knows of this place. That is Robin, so if you are not told of this place or invited you do NOT know where it is.