Since it reopened in 2022, Sandiaoling Tunnel has become a top spot for people wanting a short half-day adventure from Taipei.
三貂嶺
SANDIAOLING WATERFALL TRAIL (三貂嶺瀑布步)
This trail is one of the most popular day hikes in northern Taiwan, and for good reason. You'll enjoy waterfalls, a shaded walk by a stream and a dash of adventure...and all easily accessible using public transport.
Taiwan Trails and Tales 