The most beautifully located district museum (พิพิธภัณฑ์ท้องถิ่น) is the one of Phra Nakhon district, the central district of Bangkok. Prior to its merger with Thonburi, the Bangkok province was named Phra Nakhon after this central district. The museum is located directly next to the district office on Samsen road. It is therefore close to the popular tourist area of Khao San road.
The museum is in a wooden house in traditional Thai style, the former residence of Phraya Borirak Ratcha (พระยาบริรักษ์ราชา), who was a palace guard for King Rama V till Rama VII. In one room in the second floor it has some portrait paintings of the former home-owner.
The other rooms show various exhibits connected with the local history, the traditions of the citizen like local products, like the baskets and other wickerwork as shown in the photo.
When visiting this museum, also take a look at the district office itself located at the other exit of the lot towards Samsen Soi 3. While most of the administrative offices are located within a modern office building, there's also a historic building which probably was the original district office - however in real I don't know anything about this building, it only look worth to take a photo.