Immensely popular as a tourist destination, Asia provides a peek into a rich history and an even richer culture. In fact, some of the great wonders of the world can be found within the boundaries of this continent. Travelers to Asia will probably have the Great Wall of China as their first stop. Extending to about 2,414 kilometers or 1,500 miles with a height of about 25 feet, the wall has been said to be visible even in outer space.