13. Mackinac Bridge
The man behind the Mackinac Bridge, David B. Steinman, heavily criticized the plans for the original Tacoma Narrows Bridge -- in fact, he correctly predicted its demise. That led him to overbuild the Mackinac Bridge in a serious way. He paid so much attention to the aerodynamics that the majority of road is actually steel grating, to allow air to pass through it. According to the state of Michigan, the critical windspeed velocity is infinity. In other words, no amount of wind will topple it.
Word to the wise: the bridge won't get blown over, but cars can. There's some controversy surrounding the exact circumstances, but in 1989, a Yugo flew over the railing and into the river 150 feet below.