Introduction to Skull and Bones: Skull and Bones is a small building at Yale University. Several narrow windows are closed all year round. The whole building is shrouded in mystery. This inconspicuous building is the most mysterious and most famous building in the United States. The location of the powerful alumni association. This place is never open to outsiders. The Skull and Bones Society has extremely mysterious membership rules, and what is even more daunting is its membership list. From this Skull and Bones Society, there have been three U.S. presidents, two Supreme Court justices, as well as countless U.S. congressmen and senior cabinet officials.