There is a concrete monument on the roadside above the Tehachapi Loop, placed by the American Society of Civil Engineers that calls the Tehachapi Loop "one of the seven wonders of the Railroad world"... and of course, some friends visiting from Connecticut just had to ask "I wonder what the other six are?" Since I saw the logic of their question, I deemed it reasonable to be able to answer it. I have gone to the Tehachapi Train Museum, the Kern County Historical Society, the California Historical Society, the National Train Museum and yes, even to the American Society of Civil Engineers with that question; "What are the other 6 wonders of the railroad world since you have deemed the Loop to be one of the seven?" And guess what? NO ONE KNOWS THE ANSWER! Not even the people who placed the monument (the ASCE)... seems a bit odd, don't you think? I posted in this thread because BNSF is the road for the Loop but if anyone anywhere can enlighten me (and apparently the world) as to the other "six wonders of the railroad world", I would appreciate it. Inquiring minds want to know!