Welcome to Destination Declassified, where today, we'll dive into the world of conspiracy theories that have captivated our imagination and challenged our perception of reality. Let's start by defining 'conspiracy': it's a secret plan by a group to do something unlawful or harmful, or the act of plotting or conspiring. These theories often revolve around mystery, deception, and the unexplainable. Here are the top 10 most believed conspiracies that will definitely make you think twice.