Piatt County, Illinois

Blue Ridge, Illinois (Populated place) [Map]

Galesville, Illinois (Populated place) [Map]

Milmine, Illinois (Populated place) [Map]

North State Street Historic District (District) [Map]
Roughly along N. State St., from 300-1100 blk., Monticello, Illinois

Robert Allerton Estate (Estate)
515 Old Timber Rd., Monticello, Illinois
Also known as: The Farms, Robert Allerton Park and Conference Center

South Charter Street Historic District (District) [Map]
Roughly bounded by Marion and South Market St.s, Sage Dr., and South State St., Monticello, Illinois

Voorhies Castle (Castle) [Map]
S of Bement, Bement, Illinois
Also known as: Nels Larson House

White Heath, Illinois (Populated place) [Map]