
The Golden Gate Bridge has its own foghorn network.

Here’s why.

The fog comes on little cat feet.
It sits looking over harbor and city on silent haunches and then moves on. --Carl Sandburg
Concerning Sandburg's 1919 poem "Fog", it expresses a great deal in only 21 words. Clearly, he was influenced by haiku when he wrote it. The fog may be a metaphor for confusion or despair or isolation which can come upon us cat-like at any moment and hover over us a while like a cat surveying its territory. But sooner or later, it leaves.
Some foghorn samples, some rather eerie:
http://www.sanpedro.com/sounds/foghorn.wav
http://www.sanpedro.com/sounds/foghorn6.wav
http://www.sanpedro.com/sounds/foghorn7.wav
http://www.sanpedro.com/sounds/foghorn8.wav
http://www.sounddogs.com/previews/58...NDDOGS__fo.mp3
http://www.sounddogs.com/sound-effec...NDDOGS__fo.mp3
http://www.sounddogs.com/sound-effec...NDDOGS__fo.mp3

The goal light flashes as the puck enters the net. The loud, blasting tone that accompanies the light is a foghorn.

Foghorns are vanishing now as electronic technology makes tricky navigation effortless. There simply isn't a need to spend the money on something that no longer serves its purpose. But the hole its absence leaves in the psyche is never filled.