swimming

A swimmer walks on a beach covered in seaweed in the coastal city of Qingdao, eastern China's Shandong province, 17 June 2013. The seaweed, named enteromorpha prolifera grow quickly due to marine water eutrophication and warm weather following the ocean current that gather at the coastlines of Qingdao and the neighboring cities in recent days. This causes oxygen deficiency for the marine aquaculture and bad effects for the tourism.

Wu Hong/EPA

A swimmer walks on a beach covered in seaweed in the coastal city of Qingdao, Shandong province in eastern China.

Australian swimmer Chloe McCardel starts her swim to Florida from Havana, Cuba

Franklin Reyes/AP

Australian swimmer Chloe McCardel starts her swim to Florida from Havana, Cuba on Wednesday. 

Guests of the Marina Bay Sands

Roslan Rahman/AFP

Guests of the Marina Bay Sands hotel in Singapore look over the city-state’s financial district from a rooftop swimming pool.