Some of these instances of bizarre and impossible bridges look like they belong on a Halo-esque alien world. Check out the PC World gallery here.

Just like railways themselves, bridges don’t look the same as they did a century ago. “Railway bridges have evolved significantly over the past 100 years,” says Professor Luke Prendergast ...

Cable-stayed bridges may look similar to suspensions bridges—both have roadways that hang from cables and both have towers. But the two bridges support the load of the roadway in very different ...