Istanbul's 400-year-old Sultan Ahmed Cami Mosque, otherwise known as the Blue Mosque for its blue-tiled interior, is one of only two mosques in Turkey with six minarets. Explore.org founder Charles Annenberg Weingarten ascends one of the Mosque's stairways.
Source: http://video.nationalgeographic.com/video/exploreorg/turkey-blue-mosque-eorg
