Uttara is a fast-growing suburb of Dhaka(Boom burb), known for its planned layout, tall buildings, and improving infrastructure. It's becoming a popular place for people to live and do business in Bangladesh.
Gulshan in Dhaka is a key edge city with modern buildings, shopping malls, and luxury apartments. It's a wealthy area attracting businesses, diplomats, and many embassies.
Baridhara is an exurb in Dhaka where rich folks and diplomats live because it's quiet and safer. It's got big houses, green streets, and everything you need nearby, so you don't have to go into the busy city.
Dhaka has a total population of a bout 21 million, which means that it is a meta city. Dhaka is the only meta city and there are no mega cities as there is alot of uneven developement in bangladesh.