A little info about the broken bridge (龍騰斷橋)..... http://www.guide.taiwan-adventures.com/2011/longteng-broken-bridge
The quiet town of Sanyi becomes a bit of a tourist hot spot on weekends, especially during the Tong flower blooming season. This bridge that collapsed during an earthquake in 1935 is one of the focal points for the area.
The railway line that the bridge served was moved and has been a hiking trail since its closure. However, attempts to get the line running again seem to be gathering steam and in the summer of 2010 a trial run took place from Shenxing station to Taian.
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GPS coordinates: 24° 21' 31.02", +120° 46' 25.65"