A few steps from Jiancheng Circle and its shuttered food court, Ningxia Rd. boasts an exceptional variety of eats (at least, after dark) without the distractions of T-shirt shops, jewelry stands, and carnival games. I'd crossed paths with lingjiao, or horned water caltrops (about NT40 for a bag), in Shanghai, too; Jerry observed that these "goat horns" taste much like chestnuts, though perhaps blander.
Caltrop Cart
Ningxia Rd. Night Market, Taipei