Port Gibson is a small Mississippi town between Natchez and Vicksburg, known for being too pretty for Grant to burn. The line is probably more legend than military record, but it tells you how the town wants to be seen: old churches, courthouse squares, quiet streets, and Civil War history pressed into a compact place.
The strongest reasons to come sit outside town. Windsor Ruins is one of the great ghostly sights of the lower Mississippi, while Grand Gulf Military Park and the Port Gibson battlefield explain why this quiet area mattered in the Vicksburg Campaign. In town, the First Presbyterian Church's golden hand is a strange, memorable piece of Southern religious architecture.
Port Gibson is not Natchez, and it should not be stretched into a full destination. It works well as a one-day historical detour on the Natchez Trace or US-61, especially for travelers who already have Vicksburg and Natchez in mind.