The Beijing National Aquatics Center (Water Cube) is an aquatics center alongside Beijing National Stadium in the Olympic Green for the 2008 Summer Olympics. The construction started in December 2003 and completed in January 2007. It will host the swimming, diving and synchronized swimming events during the Olympics.

The Water Cube was designed by Australia’s PTW Architects, China State Construction Engineering Corporation International Design and Ove Arup. The design concept of the "water cube" combines the symbolisms of the architecture and the unique water bubble structure, and builds an appropriate complement to the National Stadium.

Comprising a steel space frame, it is the largest ETFE clad structure in the world. The ETFE cladding allows more heat and light penetration than traditional glass, resulting in a 30% decrease in energy costs. The structure has a capacity of 17,000 during the games that will be reduced to 6,000 afterwards. It covers an area of 79,532 square meters.