Boeing's rarely seen Aircraft

Boeing's new 787 Dreamliner has been making headlines for years. The much-anticipated, much-touted airplane is among Boeing's most well known designs in history and it has yet to hit the market. But what about the hundreds of other designs created by the legendary manufacturer?

From planes that never made it to market to spy planes that human eyes aren't supposed to spot, we take a look at some of the amazing Boeing designs you've likely never seen. Click ahead to take a gander and learn more.