Vietnam

Varies sharply by region — the north has four seasons, the south is tropical year-round, with a wet central belt.

Vietnam's urban transit remains limited: bus networks are underused and the new Hanoi and Ho Chi Minh City metros have only a single line each. Most people rely on motorbikes, ride-hailing (Grab) and taxis. Intercity travel is cheap and plentiful via sleeper buses, trains and budget airlines, though chaotic traffic limits walkability.