Even shallow waters enchant The route between Tahsi, where the Northern Cross-Island Highway begins, and the Paichi Tunnel was an important early transport route for quarrying, camphor logging and farming.
水不在深，有龍則靈北橫公路起點的大溪，往慈湖路上的百吉隧道，是先民開山、採樟、運山產的重要古道。