Buildings of rock palace fortress on rock summit, Sigiriya, UNESCO World Heritage Site, Central Province, Sri Lanka, Asia

Elevated view to lowland below with village of Portages in the centre, taken from Marvao, Portalegre district, Alto Alentejo, Portugal, Europe

Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe

View of Gorica bridge crossing the River Osumi, Berat, UNESCO World Heritage Site, Albania, Europe

Ottoman architecture of buildings in the Mangalemi quarter of Berat, UNESCO World Heritage Site, Albania, Europe

Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe

Barragem do Alqueva, Rio Guadiana river, Alqueva dam hydroelectric power, Moura, Portugal, Europe

San Anton bridge and barrio neighbourhood, Rio Jucar, Cuenca, Castille La Mancha, Spain, Europe

Christie Belle ferry boat, River Dart estuary and valley, south Devon, England, United Kingdom, Europe

Historic Ottoman period Gorica bridge crossing River Osum, Berat, Albania, Europe

Ottoman architecture of buildings in the Mangalemi quarter on north bank of River Osumi, Berat, UNESCO World Heritage Site, Albania, Europe

Landscape view of River Dart estuary and valley near Totnes, south Devon, England, United Kingdom, Europe

View looking over city centre of Berat in valley of River Osum with mountains beyond, Berat, Albania, Europe

Parador de Cuenca, Saint Paul monastery church building, Rio Huecar river gorge, Cuenca, Castille La Mancha, Spain, Europe

Landscape view River Dart estuary and valley looking across towards countryside near Dittisham, south Devon, England, United Kingdom, Europe

Perito Moreno glacier (25 km long, 2 km wide), has almost dammed the Tempano channel, Patagonia, Argentina, South America

Giant vineyards, Renmark, Murray River valley, South Australia, Australia, Pacific