The stunning promenade of Paseo Santa Lucía, which stretches 2.4km, is a world-class example of urban regeneration. This (artificial) river forms a turquoise ribbon through the heart of industrial Monterrey, offering a natural corridor between the Gran Plaza and Parque Fundidora. Take a stroll down this delightful pathway, lined with tropical greenery, or hop in one of the regular boats (M$60 return). The landscaping is amazing, with lighting illuminating the water at night and striking modernist bridges spanning the river.
There's 24-hour security, a few bars and restaurants at its western end and the whole promenade has free public wi-fi. Every city should have one.