After its revitalisation, Zhonggang Big Drain in Xinzhuang has become a popular free photo spot. Descend from the Rainbow Bridge at Rainbow Plaza onto the waterside walkway, where both banks are lined with 3D mural walls — each section with a different theme — and the colourful Lego-style floating walkway at the end is a favourite for photos. Address: No. 191, Zhongyuan Road, Xinzhuang District, New Taipei (Rainbow Plaza); open 24 hours, free entry.