I recommend you take a look at the 10 best image galleries from National Geographic of 2007. They say a picture is worth a thousand words so 10 images will be worth more than 10,000 words. Without further comments I leave you with the photographs for your visual enjoyment:
The 10 best photographs of National Geographic
I also recommend that you take a look at the 10 most popular articles of the magazine during 2007. Meteorites in Peru, the tomb of Jesus, a new ocean discovered underground, a crater found in Russia and many more interesting topics.
The 10 best National Geographic articles