Apparently, those that won - the Great Wall of China, for example, Machu Picchu - even the governments in those country appeal to the citizens to go online because it was an online vote, and vote.

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QUIST-ARCTON: There's the Great Wall of China, Petra in Jordan, Christ the Redeemer - the Statue in Brazil - Machu Picchu in Peru, Chichen Itza in Mexico, the Coliseum in Rome and the Taj Mahal in India.

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Although it is not, as is commonly believed, the only man-made object visible from space, China's Great Wall still amazes with its sheer size, and remains impressive as a testament to architectural will, and to the need to keep out the Mongol hordes.

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From the Great Wall in China to the World War II battles of Iwo Jima, a cruise-led history lesson can span thousands of years.

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Some pilots, however, may soon have to brush up on their customary airborne banter--they'll more likely be pointing out whole continents or even the Great Wall of China.

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