JINDO, REPUBLIC OF KOREA: People walk on a 2.8 kilometer long sand bar at Jindo, 472 Kilometers south of Seoul, 17 April 2007. When the meteorological and astrological conditions are favourable, the sand bar is expose one or two times per year, with South Koreans and tourists able to see this natural phenomenon for approximately one hour when it occurs. AFP PHOTO/PARK YEONG-CHEOL (Photo credit should read PARK YEONG-CHEOL/AFP/Getty Images)