Question
What are the 7 Natural Wonders of the World?
Answer
The Seven Wonders were wonders because they were among the most popular tourist destinations; even as early as 1600 BC, tourist graffiti was scrawled on monuments in the Egyptian Valley of the Kings (by which time the Great Sphinx of Giza was already a thousand years old). It is notable that the Seven Wonders sites were all man-made; no natural features were included since they were not popular destinations. With the industrial revolution's impact on the environment and the resulting naturalism of the Romanticism movement, natural features have become tourist destinations in and of themselves and as such new "Seven Wonders" lists have been created that incorporate natural features.
— Source: Wikipedia (www.wikipedia.org)