Check out this travel blog & project:Singing Bridges and the travel blog.
"I love bridges, the way they arch out across an emptiness to connect with the other side. They occupy a space in-between, the threshold between worlds, countries and states of mind. Looking fragile and tenuous, resembling a spider-web spun across the void and creating a path where there was previously only air, the bridge hangs suspended improbably by threads. You imagine these could snap at any moment, but they are engineered strong and resilient. The cables look like harps, waiting to be plucked by angels or by passing giants. How do the cables sound? Could they become strings in an instrument made of bridges stretching around the earth?"--Jodi Rose