Beijing Daxing International Airport is one of the "seven wonders of the modern world near completion", according to The Guardian. The list was made to pay tribute to the world's greatest megastructures in modern times, and Beijing's Daxing airport, set to be the world's largest, was ranked first on the list. The Guardian says: "From Britain to the Middle East and China, engineers and architects are pushing the boundaries of possibility as they strive to create the biggest and the best." [Photo/ADP Ingenierie & Zaha Hadid Architects]