How messy should you leave a hotel room? How much should you tip a cab driver? Should you say hello to strangers on the streets of a bustling metropolis? While some basic rules of civility are globally recognized (in particular, being aware of other people and treating them with respect), many answers to travel etiquette questions depend on cultural context. Let Travel + Leisure guide you through the sometimes confounding, sometimes delightful maze of international manners and customs with tips, guides, and more.