Vanderbulge Mansion was the estate of Mr. Vanderbulge. There was a large number of art treasures located in the mansion, along with the Vanderbulge Star Sapphire, which was believed to be the world's largest sapphire. Marvin White, Wendy Harris and Wonder Dog visited the mansion after receiving a message from Wonder Woman to check out the star sapphire, because she suspected it would be stolen by Doctor Hiram Gulliver. Surely enough, the misguided doctor did indeed arrive and steal the sapphire, which enraged the estate owner.