Detail of minaret of Koutoubia Mosque, with powerful muezzin speakers, Medina of Marrakesh, UNESCO World Heritage Site, Morocco, North Africa, Africa
Speakers' corner, London, England, United Kingdom, Europe
Speakers' corner, London, England, United Kingdom, Europe
Golden loudspeaker of an old gramophone, Basel, Switzerland
Members of the American Postal Workers Union rally to save six-day mail delivery, Michigan AFL-CIO President Mark Gaffney speaking to the crowd, Detroit, Michigan, USA, America
Minaret of the Great Mosque of Asmara, also known as Al Kulafah Al Rashidan, Asmara, Central Region, Eritrea
Along the Oregon coast stands a Tsunami alarm system, Bandon, OR
