England, London, Harrods store exterior illuminated at night with light trails from passing traffic.

England, London, View along bridge illuminated at night with light trails from passing traffic.

Transport, Air, Jets, Biggin Hill. Patrouille de France French air force display team flying in formation leaving blue smoke trails.

Nepal, Khumbu, Village near Namche bazar at foot of jagged, barren mountain with scree slopes cris-crossed with narrow tracks and crevices.

Ireland, County Fermanagh, Cuilcagh Mountain Park, Legnabrocky Trail to summit of Cuilcagh Mountain.

Ireland, County Fermanagh, Cuilcagh Mountain Park, Legnabrocky Trail.

Ireland, County Fermanagh, Cuilcagh Mountain Park, Legnabrocky Trail.

USA, Nevada, Las Vegas, City view of the MGM Grand Casino Hotel at night.

Mexico, Federal District, Mexico City, View over Palacio Bellas Artes at night from Torre Latinoamericana.

Turkey, Istanbul, Sultanahmet, Suleymaniye Mosque silhouetted against pale sunset sky with aircraft contrails high above.

Italy, Veneto, Venice, Giudecca island, Evening view towards illuminated Campanile of St. Mark with vaporetto water bus to Murano and Burano in blurred motion in foreground with light trails reflected...

Italy, Veneto, Venice, Giudecca island, Early evening view towards illuminated Campanile of St. Mark with vaporetto water bus to Murano and Burano in blurred motion in foreground with light trails ref...