16. The Astrodome
Many sports fans like to cite the Astrodome, also known as the Harris County Domed Stadium, as the eighth wonder of the world. While some people think this building is simply a dome structure or a stadium, there is more to the Astrodome that meets the eye.
The dome opened in 1956 and became the first building of its type. In fact, the Astrodome paved the way for many other dome-like structures for the next few decades. We still build sporting event buildings like a dome today.
