What is heaven? Does it even exist? If so, where is it—and what is it like there? Some people don't believe in heaven. Others say there are three heavens—or even seven. Some say you go to heaven when you die. Others say no, you go to a place called purgatory first, then maybe heaven later. Some say heaven is not a real place, but just a state of mind. There are those who believe that eventually, everybody will end up in heaven. But others say very few people will make it there.