Facade and northern portal (Portal of the Alliance) of the Cathedral, UNESCO World Heritage Site, Chartres, Eure-et-Loir department, Centre-Val-de-Loire region, France, Europe

Tomb of Seti I, Valley of the Kings, UNESCO World Heritage Site, Thebes, Luxor, Egypt, North Africa, Africa

Post Office Building, Croydon, South London, England, United Kingdom, Europe

Wells Cathedral, a 12th century Anglican cathedral dedicated to St. Andrew the Apostle, seat of the Bishop of Bath and Wells, Wells, Somerset, England, United Kingdom, Europe

Luentec Tower, Colani-egg on a shaft tower in the Technologiezentrum technology center Luenen-Brambauer, North Rhine-Westphalia, Germany, Europe

Light art at the SANAA building, Zollverein School, by Eva-Maria Joeressen, at the GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen, North Rhine-Westphal

Luentec Tower, Colani-egg on a shaft tower in the Technologiezentrum technology center Luenen-Brambauer, North Rhine-Westphalia, Germany, Europe

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Art installation by the Raumlaborberlin, Soap Opera, many hundreds illuminated balloons at a mine shaft, GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen

Colourfully lit staircase in the former steelworks, Landschaftspark Duisburg Nord landscape park, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

Glowing balloon on the grounds of the Zeche Zollverein mine, part of the Schachtzeichen art project of the Kulturhaupstadt-Jahr Ruhr2010 Capital of Culture-year, 311 yellow balloons mark former mine shafts, Oberhausen, Ruhrgebiet area, North Rhine-Westpha

Green-lit tree trunks and steel wall in the former steelworks, Landschaftspark Duisburg Nord landscape park, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

Construction site of the Kranhaeuser buildings on Rheinau port, Rheinau peninsula, Cologne, North Rhine-Westphalia, Germany, Europe

Pipe with wheel in the former steelworks, Landschaftspark Duisburg Nord landscape park, Ruhrgebiet area, North Rhine-Westphalia, Germany, Europe

GlueckAuf2010 cultural festival at the start of the European Capital of Culture year, on the site of the Zeche Zollverein mine and coking plant, Essen, North Rhine-Westphalia, Germany, Europe