Classics, modern fiction, non-fiction and more. Written for secondary and adult students the Oxford Bookworms Library has seven reading levels from A1-C1 of the CEFR.What are the most beautiful, the most interesting, the most wonderful things in the world? The Great Pyramid, the Great Wall of China, the Panama Canal - everyone has their favourites. And there are natural wonders too - Mount Everest, Niagara Falls, and the Northern Lights, for example. Here is one person's choice of eleven wonders. Some of them are made by people, and others are natural. Come and discover new wonders.