The Skyscraper Center offers a wealth of information on these two queries, and more. There are pre-selected quick lists and facts on such topics as completed tallest buildings, proposed tallest buildings, demolished tallest buildings, number of “supertall” buildings, etc. In addition, you can create your own lists; for example, the United Arab Emirates has 440 tall buildings, among them the world’s tallest at 2717 feet – the Burj Khalifa. But there is so much more information: each building has its own separate page containing splendid photos, facts (official name, address, year started/completed), companies(contrators, owners, developers), figures (number of floors, elevators, parking spaces, hotel rooms, etc) as well as news articles, videos, and technical papers. Where does the United States rank? We come in with the 8th tallest building – the Willis Tower. The Empire State Building is 18th, which is pretty remarkable given that all of the buildings ahead of it are decades newer. And Jersey City makes the list with 55 structures in various stages of development (vision, in progress, completed), headed by the completed 30 Hudson Street (aka Goldman Sachs Tower) at 781 feet.