S
- sports (26)
- springhouses (32)
- springs (bodies of water) (1)
- springs (machinery components) (1)
- squares (open spaces) (1)
- stables (112)
- stadiums (6)
- stagecoach stations (5)
- stairways (3)
- standardization (1)
- standpipes (2)
- state flags (1)
- state government (5)
- state parks & reserves (5)
- states (1)
- steam engines (5)
- steam locomotives (2)
- steam power plants (7)
- steel arch bridges (21)
- steel girder bridges (36)
- steel I-beams (1)
- steel industry (35)
- steel mills (18)
- steel trestles (1)
- steel truss bridges (168)
- steel (275)
- stock exchanges (1)
- stockades (2)
- stockyards (1)
- stone arch bridges (5)
- stone bridges (61)
- stone buildings (freestone) (19)
- stone buildings (granite) (28)
- stone buildings (limestone) (11)
- stone buildings (sandstone) (53)
- stone buildings (736)
- stone carving (1)
- stone foundations (1)
- stone piers (1)
- stone retaining walls (2)
- stone walls (2)
- stonework (granite) (1)
- storage facilities (263)
- storage tanks (17)
- storage (509)
- storefronts (10)
- storehouses (49)
- stores & shops (171)
- storm cellars (2)
- storm sewers (1)
- Streamline Moderne architectural elements (10)
- street furniture (1)
- streetcars (1)
- streetscapes (1)
- streets (15)
- structural engineering (1)
- structural fires (6)
- structural frames (2)
- stucco (3)
- studios (8)
- suburban life (11)
- suburbs (1)
- subway stations (1)
- subways (2)
- sugar industry (63)
- sugar mills (13)
- sugar plantations (11)
- sugar refineries (3)
- summer houses (6)
- summer kitchens (3)
- summerhouses (2)
- sunbursts (1)
- Sunday schools (2)
- supermarkets (1)
- surge tanks (1)
- surgery (1)
- surveying (1)
- suspension bridges (37)
- swimming pools (27)
- swimming (32)
- swing bridges (27)
- symmetry (1)
- synagogues (11)