It really depends on the era that you are interested in. There are the original seven wonders, the seven wonders of the modern world, and the 'new' seven wonders of the modern world. For this question, I will reveal the seven 'natural' wonders of the world as they are timeless and will be here, even as the 'newest' wonder hits our lives. Here they are, the seven 'natural' wonders - Grand Canyon,
The Great Barrier Reef, The Harbor at Rio de Janeiro, Mt. Everest,
Northern Lights, Paricutin Volcano, and the Victoria Falls.