This trail in Keelung's Zhongshan District isn't the prettiest walk I've ever done, but it certainly packs in a lot of interesting spots into its short length. There are two lighthouses, port views, a fort, and a subterranean temple.
keelung city
CROUCHING TIGER HILL (臥虎山)
A brief loop with an interesting temple and some exploration of a lesser known peak in Keelung.
NUANDONG VALLEY LOOP (暖東峽谷O型)
This short and sweet loop in Keelung’s overlooked Nuannuan District makes a great half day exploration. The trail tracks through quiet woodland and boasts beautiful views of water-sculpted rocks, as well as a couple of stream crossings and a photogenic land god temple thrown in for good measure.
TAMSUI-KAVALAN TRAILS: XIZHI to RUIFANG (淡蘭古道：汐止/暖暖/瑞芳)
The northernmost span of the Tamsui-Kavalan Trails follows the course of the Keelung River upriver from Taipei almost as far as the coast before veering south towards Jiufen. The section between Xizhi and Ruifang jumps from small town to small town, passing lots of temples and traces of history along the way.
Taiwan Trails and Tales 