Kabootar Khaneh, or Pigeon Tower, refers to structures built around 400 years ago in desert and central regions of Iran, near gardens and farms. These structures were usually cylindrical or cubic in shape and had lattice windows designed to allow only pigeons to enter, thereby protecting them from predatory birds. These towers were constructed with the aim of collecting pigeon droppings, which were then used in agriculture, tanning, leather production, and even making gunpowder.