Historic sites History 40 Historic buildings 19 Conservation and restoration 12 Buildings, structures, etc 11 Description and travel 7 Guidebooks 7 more ... Historical museums 7 Antiquities 6 Lieux historiques 6 African Americans 5 Excavations (Archaeology) 5 Museums 5 Battlefields 4 Fugitive slaves 4 Historical markers 4 National parks and reserves 4 Underground Railroad 4 Walking 4 Cemeteries 3 Historic districts 3 History, Local 3 Homes & haunts 3 Race relations 3 Sepulchral monuments 3 Social life and customs 3 Women 3 Abolitionists 2 Architecture 2 Buildings 2 Campaigns 2 Enslaved persons 2 Highway planning 2 Histoire 2 Historic houses, etc 2 History, Military 2 Homes and haunts 2 Iron and steel workers 2 Iron-works 2 Jews 2 less ...