The Pioneer Yosemite History Center covers several acres (see A on the map). Don't pass up the collection of old wagons and coaches before you cross the covered bridge. Once across the bridge, which is a great photo subject, spend time photographing the interior and exterior of the many buildings. The artist cabin, the Wells Fargo building, and the ranger cabin all offer very interesting interiors. The blacksmith shop is quite interesting, especially for demonstrations of blacksmithing techniques.
The best location from which to photograph the Pioneer Yosemite History Center: (A) the grounds around the History Center. Other photo ops: (13) Mariposa Grove, (27) Wawona Hotel.