The Southern Ridges is one of the more interesting public projects of recent years. The ambitious plan links five existing hills, ridges and parks with a 10km trail that takes in historical sites and mature tropical rainforest. A series of bridges was commissioned, one of which is the wonderful Henderson Wave by London-based IJP Corporation and RSP Architects Singapore. It takes two hours to walk from one end of the Ridges to the other, during which you will be trekking through the forest at tree-top level, or crossing a road at 30 metres in the sky. In Singapore, we don’t have any genuine mountain trails to speak of, but I love this fascinating combination of urban and nature.