Nantou County-pure mountain splendor
Hehuanshan ("fucking cold mountain" in Chinese. Not really, but it was fucking cold up there at 3,000 m).
Chun Tai Shan Monastery
Sun Moon Lake (hopefully, it is no longer mobbed by rude mainlanders)
Lishan-Taiwan's pear farming region (shueli)
Cingjing Farm (cheesy and kitschy but the environmental is beautiful nonetheless)
Bamboo Mountain (Zhushan)