There are only 54 active Wigwags remaining in the United States.
When I hid this cache in 2010, there were 68 remaining, so they are disappearing at the rate of 7 per year.
Look straight down the sidewalk from the cache, about 320 ft to the East, and you can see one of the 54.
What is a Wigwag, you may ask?
Answers here:
http://en.wikipedia.org/wiki/Wigwag_(railroad)
and here:
http://www.trainweb.org/dansrailpix/WIG_WAG_list.htm
And, lastly but not leastly, someone has put a video on youtube of this wigwag in action. You can find it here:
http://www.youtube.com/watch?v=whkPhKbO1qc
Enjoy the day.