It is relatively easy to walkabout in Ho Chi Minh City. Many tourist spots are concentrated within few blocks, so one can easily visit most of them on foot. The Post Office has a bright and tall arc doom, more like railway station than post office.
Right outside is the impressive Norte Dame Cathedral. So one can easily feel the French influences (beside the short baguette and coffee).
It is peaceful to spend sometime inside the cathedral, for some reflection or praying.
And few blocks away will be the People Community Hall. If you have time and money to spend, going up to the roof top bar on Rex Hotel nearby will be good scenery of the city.
Well, I drink coffee more than liquor. So I say pass and visited more street on foot. One can notice this church has Chinese words on it, because it was at China Town.