Big Brother is watching: Chinese city with 2.6m cameras is world's most heavily surveilled
Cities around the world are scaling up their use of surveillance cameras and facial recognition systems – but which ones are watching their citizens most closely?
Urban trees offer huge benefits for climate regulation and personal wellbeing – and cities from Tampa to Frankfurt are intent on boosting their numbers
Hex in the city: which terrifying town hits Halloween hardest?
Derry boasts a four-day festival, while in West Hollywood 500,000 revellers take part in a huge LGBT event – but which city goes the furthest to spook its citizens?
Portland has a vegan strip club, Palitana is a meat-free zone and Bristol makes the most vegan-related Google searches, but what makes a city vegan-friendly?
Which city in the world has the cheapest cannabis – and the most expensive?
A new survey of the cost of buying marijuana in 120 cities around the world suggests it is most expensive in Asia – but not necessarily cheaper in those cities where it is legal
From pro-democracy demonstrations in Hong Kong to far-right and anti-Trump marches in the US, protests occur daily in public spaces worldwide – but can we measure which city has the most?
Evenly spread over all of the world’s mountains, deserts and other terrains, we would be standing 150 metres away from our nearest neighbours. In the most densely populated cities – from Dhaka to Medellin – we’re right on top of them
Driving to work, driving to dinner, driving to meet friends … this quintessentially American invention requires a limitless supply of land and resources. Los Angeles is infamously sprawling but is it the worst offender?