© istockphoto| National Stadium – Pechino – Cina

© istockphoto| Scotiabank Saddledome – Calgary – Canada

© istockphoto| FBN Stadium – Johannesburg – Sud Africa

© istockphoto| Sapporo Dome – Sapporo – Giappone

© istockphoto| National Aquatics Centre – Pechino – Cina

© istockphoto| Ericcsson Globe – Stoccolma - Svezia

© istockphoto| Fisht Olympic Stadium – Sochi – Russia 

© istockphoto| Allianz Arena – Monaco – Germania

© istockphoto| Wembley – Londra – Gran Bretagna