Parks 24 History 19 Description and travel 7 Handbooks, manuals, etc 7 Historic buildings 7 Maps 6 Architecture 5 more ... Dwellings 5 Sculpture 4 City planning 3 Springs 3 Water-supply 3 Architecture, Domestic 2 Bridges 2 Church buildings 2 Discovery and exploration 2 Hotels & taverns 2 Monuments 2 Monuments & memorials 2 Norse 2 Parades & processions 2 Poetry 2 Public works 2 Railroad stations 2 Snow 2 Streets 2 Views 2 Volunteer workers in parks 2 Watercolor painting 2 American Revolution Bicentennial, 1976 1 Amphitheaters 1 Aquatic sports 1 Audiences 1 Balloons (Aircraft) 1 Basses (Fish) 1 Blizzards 1 Bodies of water 1 Buildings 1 Buildings, structures, etc 1 Centennial Grounds 1 less ...