Egrets are seen in the woods at Hongsha Village of Guangpo County in Fangchenggang, a port city in southwest China's Guangxi Zhuang Autonomous Region. Some 300,000 migrant birds of 187 varieties stop at the city to take a breath annually during their migration between Australia and Asia due to the good environment in the area and the increased awareness of protecting birds among local people
In man's search for mineral wealth, many enormous holes have been dug. In addition, nature occasionally produces some astounding holes. This list is a pick of the five most spectacular natural or manmade holes in the face of the earth.