The 11 biggest cities in the world all have populations of more than 21million, and one of them is sinking below sea level.

Even though most Americans have to sit on hours-long flights to get to it, Asia remains as popular as ever with Travel + Leisure readers—and many people, it seems, are enchanted by the unmatched ...

The number of cities with populations in the millions worldwide continues to rise, according to the latest “World Urbanization Prospects” report by the UN. The new leader in terms of population is a ...