yet it’s one of the best stargazing spots in the country and the only place where you can find three natural bridges in such close proximity. Hike right up to these stunning rock formations—among the ...

Arizona's gorgeous landscape is home to the world's largest natural travertine bridge, which you can explore on various trails throughout the state park.

China is known for constructing some of the most awe-inspiring projects across the world, and it’s not stopping anytime soon. The country is working on an incredible bridge that will become the ...

There are bridges in the world that stretch for miles, towering over rivers and connecting countries across huge distances. But tucked away in a quiet corner of southern Europe is one bridge that ...

Can natural gas can be considered a lower-carbon "bridge" fuel, as U.S. President Barack Obama and many others have billed it, or is it simply a continuation of our dependence on fossil fuels?