Ireland
The Great South Wall is located rather unappealingly by Dublin's largest sewage works. Despite the occasional bad smell (!) it is a great walk, and not well known even to Dubliners. Walk along the nature reserve from Sandymount Strand to the wall, and then out to the lighthouse on the end. Birds, boats, the odd seal and the ubiquitous cranes on the Dublin skyline: nature in an industrial setting.
A ring of pearls that runs from Dollymount to Portmarnock and Malahide, with huge sweeps of sand and dunes perfect for bracing walks, flying kites and gawping at the horizon. Stop for a well-deserved meal in the restaurants of Malahide. Savour the view and the chips or ice creams at Howth.
Take the DART from the city centre; www.irishrail.ie/dart/home/
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