Ignoring Cultural Customs
This shouldn’t need to be said and yet it does: Social etiquette matters when traveling abroad. Not bothering to familiarize yourself with important customs such as greetings, tipping, and even which hand to use for passing a plate is a surefire way to embarrass yourself and disrespect others. We can’t imagine you’d want to do either of those things.
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Dressing Inappropriately
It may be fine to walk around in mini shorts during a heatwave at home (and the weather may even warrant minimal apparel on your travels), but that might not be culturally appropriate depending on your destination. For example, it’s customary to cover arms and legs at temples across Thailand and Bali, yet hundreds of tourists each year snap selfies wearing outfits that fall way outside of those respectful guidelines.