Mexico, Oaxaca, Hierve el Agua, Female tourist standing in limestone pool with view towards mountainous landscape densely covered with trees.

USA, Nevada, Las Vegas, The Strip, view across the pool outside the Bellagio toward Caesars Palace hotel and casino.

China, Yunnan Province, Lijiang, Deyue pavilion and Suocui bridge, Black Dragon Pool.

China, Yunnan Province, Lijiang, Deyue Pavilion and Black Dragon Pool.

China, Yunnan Province, Lijiangf, Black Dragon Pool and Deyue Pavilion with the Jade Dragon Snow Mountain behind.

China, Yunnan Province, Lijiang, Deyue Pavilion and Black Dragon Pool.

USA, Nevada, Las Vegas, Bellagio hotel and casino on the strip with fountain display in the foreground.

USA, Nevada, Las Vegas, Bellagio hotel and casino on the strip with fountain display in the foreground.

USA, Nevada, Las Vegas, Bellagio hotel and casino on the strip with fountain display in the foreground.

USA, Nevada, Las Vegas, Bellagio hotel and casino on the strip with fountain display in the foreground.

India, Delhi, 2010 Commonwealth games, Pool events, Swimming, back stroke race start.

India, Delhi, 2010 Commonwealth games, Pool events, Swimming