caveswimmer
02-15-2007, 08:40 PM
Anybody know the story on all the white arrows in the Serpentine Tunnel upstream of the Harper Tunnel? It seemed like there was a blank white arrow every 10 to 20 feet when I dove there last Sunday.
They didn't look well placed for surveying, nor did they appear to mark any obvious features. Maybe a prank? I got a good chuckle out of it.
They didn't look well placed for surveying, nor did they appear to mark any obvious features. Maybe a prank? I got a good chuckle out of it.