Manhattan financial district skyline as seen from Jersey City, New York, United States of America, North America

Twin towers of World Trade Centre and modern hotels, central business district, Colombo, Sri Lanka, Asia

Skyline of offices and the World Trade Centre Phase 3 building in the background, in Guomao CBD, Beijing, China, Asia

1 World Trade Centre Tower and New York's financial district as seen from Liberty State Park, New York, United States of America, North America

Manhattan financial district skyline as seen from Jersey City, New York, United States of America, North America

1 World Trade Centre Tower and New York's financial district as seen from Liberty State Park, New York, United States of America, North America

1 World Trade Centre Tower and New York's financial district as seen from the Hudson River, New York, United States of America, North America

A small American flag at the 9/11 Memorial Park in New York City with the new World Trade Centre rising in the background, New York, United States of America, North America

A small American flag at the 9/11 Memorial Park in New York City with the new World Trade Centre rising in the background, New York, United States of America, North America

One World Trade Center also known as Tower 1 and Freedom Tower, Manhattan, New York City, New York, USA

One World Trade Center also known as Tower 1 and Freedom Tower, Manhattan, New York City, New York, USA

One World Trade Center also known as Tower 1 and Freedom Tower, Tower 7 on right, Manhattan, New York City, New York, USA

Placa, Stradun at dusk, old town, Dubrovnik, Dubrovnik County, Croatia, Europe

Beurstraverse shopping centre, also known as Koopgoot, in front of the World Trade Center, WTC, a tower with a glass facade at the Beursplein, Rotterdam, South Holland, the Netherlands, Europe

Bischofshof beer garden restaurant, historic centre of Regensburg, UNESCO World Heritage Site, Bavaria, Germany, Europe

Am Plan market place, old town of Koblenz, UNESCO World Heritage Site Oberes Mittelrheintal landscape of the Upper Middle Rhine Valley, Rhineland-Palatinate, Germany, Europe

World Trade Center, WTC, a tower with a glass facade at the Beursplein, in front of dark clouds, Rotterdam, South Holland, the Netherlands, Europe

View towards Altes Haus, Old House, in the historic town centre of Bacharach, UNESCO World Heritage Site Upper Middle Rhine Valley, Rhineland Palatinate, Germany, Europe

Placa, Stradun at dusk, old town, Dubrovnik, Dubrovnik County, Croatia, Europe

Night, tower, Franciscan Monastery, Placa, Stradun, old town, Dubrovnik, Croatia, Europe

Restaurant in the old town of Dubrovnik at night, UNESCO World Heritage Site, bell tower and Sponza Palace at back, central Dalmatia, Dalmatia, Adriatic coast, Croatia, Europe, PublicGround