Ash Wednesday celebration in Saint Philippe du Roule church, Paris, France

A lone goat sheltering among the stones of the Great Pyramids in Egypt

A lone goat resting on the Great Pyramids in Egypt

Juvenile Porkfish (Anisotremus virginicus), night-time colouration against sandy bottom, Bahamas, Caribbean

Climbers ascending Mt. Marmolada, Dolomites, Westgrat fixed rope route, Mt. Marmolada in the back, Trentino, Italy, Europe

Rush hour, traffic, long exposure, Kiel, Schleswig-Holstein, Germany, Europe

Rush hour, traffic, long exposure, Kiel, Schleswig-Holstein, Germany, Europe

Aerial view, Vereinigte Gibraltar mine on the Kemnader reservoir with a Ferris wheel, Schachtzeichen RUHR.2010 art installation, Bochum, Ruhrgebiet region, 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

Markings on the runway of the former Tempelhof Airport, Berlin, Germany, Europe

Cobble stones in the street marking the former course of the Berlin Wall, Berlin, Germany, Europe

Cobble stones in the street marking the former course of the Berlin Wall, Berlin, Germany, Europe

Former course of the Berlin Wall at Potsdamer Platz, Berlin, Germany, Europe

Aerial view, Constantin 6, 7, Schachtzeichen RUHR.2010 art installation, Bochum, Ruhrgebiet region, North Rhine-Westphalia, Germany, Europe