Bangkok, as well as any other Thai city, is a very religious place. That is why travelers should show great respect for local religious customs. Criticizing religion is strictly forbidden, as well as giving negative comments about the royal family.
Do not show your anger or speak in a raised voice in public places and on the streets of Bangkok. This will be considered a sign of bad taste and bad manners.
You should be more careful with your gestures as no careless touch or embrace are allowed.
Select your clothes carefully. This is particularly true for women. Sloppy appearance will be regarded negatively. Sexy and very trendy clothes are better to leave at home, as you may be not allowed to enter local churches and public institutions.
We do not recommend going on a trip on summer as your holiday can be disrupted by long tropical rains.