Places
- Yellowstone National Park1
- York County (Va.)--History1
- York County (Va.)--History--18th century1
- York County (Va.)--History--19th century1
- York County (Va.)--History--20th century4
- York County (Va.)--History--Revolution, 1775-17831
- Yorktown (Va.)4
- Yorktown (Va.)--History--19th century1
- Yorktown (Va.)--History--20th century6
- Yorktown (Va.)--History--Siege, 1781--Centennial celebrations, etc4
- Yugoslavia1