READ FIRST - safety
At short notice, strikes and political unrest can occur, and some governments urge caution. Read the travel advice from your own government plus other advisories shortly before booking and once more before flying, and keep contact details for your embassy or for whichever country represents yours. Some areas, such as Rohingya camps near Cox's Bazar, require special permits; your operator can advise.
Entry
What is required depends on your passport, so consult the official site below. Sources say that visa applicants go to a Bangladeshi embassy or, where permitted, get one on arrival, possibly after an online pre-application. A Bangladeshi embassy, or the Ministry of Foreign Affairs, can confirm the rules, so ask before booking, and rely on government sites alone. Carry a return ticket, hotel details and a passport with 6 months of validity.
Culture and practical - take note
Hospitable and densely populated, Bangladesh is Muslim-majority. Dress modestly, covering shoulders and knees (women may carry a scarf). Eat and hand things over with the right hand. The greeting is 'Assalamu alaikum'. Friday-Saturday is the weekend, and alcohol is restricted. In daylight during Ramadan, avoid eating or drinking in public. Seek permission before photographing people, particularly women; military and government sites must not be photographed. Allow extra time for the very heavy traffic in Dhaka. Floods come with the monsoon (June-September), and a licensed operator should be used for visiting the Sundarbans. Only bottled water should be drunk. Halal food is available everywhere.