Secrets of 10 world wonders
Stonehenge. Easter Island. Petra. Some of the most mysterious spots in the world -- which is why they're called wonders, right? Lonely Planet dropped a list of the secret histories of 10 of the world's wonders. Check some of the secrets out below, and read more at LonelyPlanet.com or get the Lonely Planet book, "The World's Great Wonders."
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World wonder secrets
Ancient graffiti, among other clues, suggests that the pyramids at Giza, Egypt, were built not by slaves but by skilled laborers. Read more here.