Which is the biggest country in the world by area?
Which is the biggest continent in the world?
Which is the biggest ocean in the world?
Which is the biggest desert in the world?
Which is the biggest island in the world?
Which is the biggest lake in the world by area?
Which is the biggest river by volume of water?
Which is the biggest rainforest in the world?
Which is the biggest animal on Earth?
Which is the biggest city in the world by population?
Which is the biggest dam in the world?
Which is the biggest building in the world by volume?
Which is the biggest stadium in the world by capacity?
Which is the biggest coral reef system in the world?
Which is the biggest peninsula in the world?