Hoi An is a historic, ancient town in Central Vietnam and was a very busy international port once. Ships from all over the world came and traded here, but the Japanese and Chinese lingered and left their mark. You can find a mix of their and Vietnamese styles everywhere around the city. The American War left Hoi An virtually untouched and the preserved buildings of Old Town look exactly like they did a few centuries ago.
It’s “touristy”, yes, the streets are crowded with foreign and Vietnamese tourists and long lines of cyclos loaded (with mainly Chinese) tourists drive by all the time … and the street sellers are everywhere … but it’s great!