One of HCMC's most popular attractions, Saigon Central Post Office is the largest post office in Vietnam. Built between 1886 and 1891 by renowned architect Gustave Eiffel, the vaulted roof and arched windows are reminiscent of early European railway stations. An enormous picture of Ho Chi Minh overlooks proceedings.
Even if you don't have a bundle of postcards to send to the relatives back home, you should still drop into Saigon Central Post Office to admire the interior. Check the working phone booths, and the beautiful, handpainted maps on either side of the interior walls that depict Saigon and the surrounding area in 1892, and the former telegraph lines of Cochin China. Souvenir stalls off either side of the entrance sell the usual memorabilia, including a large selection of fictional "Tintin in Vietnam" covers.
This is very much a working post office. You can send letters and parcels (don't wrap them up till you're at the counter), change money, buy stamps and books, and browse a good selection of collector coin and stamp sets. Across the street from Saigon Central Post Office lies Notre Dame Cathedral, so you can photograph both sights in the one visit.
Meet 83-year-old Duong Van Ngo, who has worked for the post office for 60 years, 22 years as a letter writer, writing in Vietnamese, French and English.