When it comes to sidewalk culture, Vietnam is in a league of its own. From the lively street markets to the vibrant open-air cafes, there's an incredible energy that permeates every corner of the country. And it's not just the large cities like Hanoi and Ho Chi Minh City that are teeming with life—the smaller towns and villages have their own unique charm as well. photo: Trung Thanh If you're thinking about traveling to Vietnam,…