Have you ever tried to measure a skyscraper? It isn't easy! Do flagpoles count? What about spires? And, for buildings still on the drawing board, how do you keep track of the ever-shifting construction plans? To compile our own master list of World's Tallest Buildings, we use skyscraper statistics drawn from several sources. Here are our favorites.
Lots of nifty diagrams make Skyscraperpage.com fun and educational. While covering an enormous amount of material, the site is also friendly and accessible. Members can contribute photos and there's a lively discussion forum. And, you'll find a lot to discuss! When listing the world's tallest buildings, Skyscraperpage.com challenges the statistics found on most other skyscraper sites. Be patient while this graphics-heavy site loads.
From the Public Broadcasting Service, "Building Big" is the companion Web site for a TV show by the same title. You won't find a comprehensive database, but the site is chock full of interesting facts and trivia about tall buildings and other large structures. Also, there are several interesting and easy-to-understand essays about skyscraper construction.
Located in New York City, the Skyscraper Museum offers exhibitions, programs, and publications that explore the art, science, and history of skyscrapers. Find facts and photos from the exhibits here.
This mega-database can be overwhelming and frustrating to use. So, why include it? Because it has so much! With some 91,000 skyscrapers, this is the one place to come for information you can't find anywhere else. You can also purchase a license to use photos.
Of all the skyscrapers in the world, which is your favorite?
Tell us! 
