Interesting fact: Echo chamber From Wikipedia, the free encyclopedia When used literally, the term echo chamber refers to a hollow enclosure used to produce echoing sounds, usually for recording purposes. For example, the producers of a television or radio program might wish to produce the aural illusion that a conversation is taking place in a cave; this effect might be accomplished by playing the recording of the conversation inside an echo chamber, with an accompanying microphone to catch the echoes. The cache is NOT on or inside of the BIG ECHO CHAMBER. When we came past this area as kids our father use to always beep on the horn. I'm not talking a quick little toot. I'm talking from one side to the other. Cachers just gotta have some fun every now and then. OPTIONAL request:(just to add fun to the adventure) As as you leave this cache site you have to beeeeeeeeep that horn all the way through the echo chamber. It works best with your windows open. I got the coords as close and accurate as I could. (O'ya have your tweezers handy)