Maps illustrate how the museum developed over a period of 20 years. Overall, the museum saw considerable increase in exhibition area as well as car park, although recreational facilities were reduced.
In 1990 there was a single car park in the east side of a large entrance which was located in the middle of the building. 3 exhibition rooms were entered through the entrance that the biggest one was on the west where visitors met a restaurant and shop following it. Another 2 small main rooms were right corner of entrance. There were also a cottage in the southern west and a garden in the southern east of the museum. Museum was surrounded by garden on the north and main road on the south.
Twenty years later in 2010, car park expanded through the south and took place of garden at all, as a result the road connecting the car park with main road was halved. Two small exhibition rooms were merged in order to broad and the other large one was shrunk and replaced by a enlarged shop. Furthermore, new café began to serve visitors instead of a cottage. No change observed in some area such as a restaurant, main road and a garden.