The Blue Mosque, Istanbul

Photograph by Dave Yoder

Istanbul's Blue Mosque, nicknamed for the color of its interior tiles, welcomes the faithful as well as visitors by the thousands. Writing about the city "where East meets West" in Traveler's October 2010 issue, author Pico Iyer says: "Here is a place whose Blue Mosque has an LCD screen flashing the time in Paris and Tokyo. Turkey's most cosmopolitan metropolis has more billionaires than any city but Moscow, New York, and London."

See more photos in our Istanbul Photo Gallery.