Skyscrapers in city lit up at night, Wacker Drive, Michigan Avenue, Chicago, Illinois, USA

Skyscraper in city lit up at night, R. R. Donnelley Center, Wacker Drive, Chicago, Illinois, USA

Railroad tracks with city skyline at night, Roosevelt Boulevard, Chicago, Illinois, USA

Skyscraper and road in city viewed from John Hancock Center, Wrigley Building, Michigan Avenue, Chicago, Illinois, USA

Traffic moving on road in city, Water Tower Place, Chicago, Illinois, USA

Government building lit up at night, Lincoln Memorial, Washington Monument, Washington DC, USA

Hotels lit up at night, Las Vegas, Nevada, USA

Cityscape lit up at night, Las Vegas, Nevada, USA

Skyscrapers lit up at night, Space Needle, Washington State, Usa

Office buildings lit up at night, San Diego, California, USA

Theater building lit up at night, State Theater, Gaertnerplatz, Munich, Bavaria, Germany

Museum lit up at night, Hamburg, Germany

Office buildings lit up at night, Frankfurt, Germany

Buildings in city lit up at night, Frankfurt, Germany

Gurdwara lit up at night, Harmandir Sahib, Amrit Sovar, Amritsar, Punjab

Lantern lit up on wall of citadel, Calvi, Corsica, France

Close-up of illuminated advertising

Windows of building lit up at night, Chicago, Illinois, USA