L
- Labor leaders. (4)
- Labor unions. (6)
- Laboratories. (4)
- Laborers. (16)
- Lakes & ponds. (16)
- Lamps. (36)
- Land. (1)
- Landscape paintings. (1)
- Landscape photographs. (130)
- Lanterns. (2)
- Laundries (Rooms & spaces). (8)
- Laundry. (1)
- Lawyers. (16)
- Legislators' spouses. (12)
- Legislators. (24)
- Liberty bell. (2)
- Librarians. (12)
- Libraries (Rooms). (7)
- Libraries. (285)
- Light fixtures. (17)
- Lighthouses. (6)
- Lighting. (8)
- Lightning. (4)
- Lions. (1)
- Liquor stores. (12)
- Living rooms. (111)
- Lobbies. (104)
- Locks (Hardware). (1)
- Locks (Hydraulic engineering). (4)
- Lodges. (1)
- Log buildings. (3)
- Logos. (1)
- Logs. (4)
- Lovers' lanes. (1)
- Luggage. (1)
- Lumber industry. (34)
- Lutheran churches. (1)