Gedi is an abandoned city in Kenya that had a stone palace, several stone homes, and a mosque, with features such as a water system that put medieval Europe to shame. Relics from Europe and Asia have been found there, indicating global trade. The city had a population as high as 3,000 people at its height in the 13th century. But for some reason, the residents left and no one has lived there for hundreds of years. See lots more pictures of Gedi at Kuriositas. Link -via the Presurfer

(Image credit: Flickr user Viaggi Spensierati)