Seoul at dusk on Tuesday, with the Han river flowing through the centre. The metropolitan area of the capital of South Korea is one of the largest in the world, with a population of some 25m people.
People throw tomatoes during a recreation of the famous Spanish tomato-throwing festival, La Tomatina, at Canary Wharf, London on Wednesday.
Victor Rojas/Getty Images
Burning cars are pictured in a highway in Ecatepec near Mexico city, on Tuesday. A gas tanker exploded in a Mexico City suburb on Tuesday, killing at least 18 people and damaging several homes and cars