According to Missouri Roadsides by Bill Earngey, ISBN 0-8262-1021-X, 1995:
Troy was platted in 1819 along what would become US-61 at the sight of the derelict War of 1812 fort "Wood's Fort"
The architecture in Troy:
1859 Christian Church
1868 Presbyterian Church (remodeled 1940s)
1st Church / Masonic Hall 1837-1852
Lincoln Co. Court House 1870 (additiions in 1930s, 1974)
Cuivere Island Conservation Area:
Mississippi River island 15 miles east of Troy as the crow flies. 1/2 in Lincoln Co. 1/2 in St. Charles Co.
Site of Fort Howard (War of 1812 fort)
Boat access only
Boone's House Site:
The brother of Daniel Boone
Stone house site 1800 from Spanish land grant.
SR C at US 79, Gravel Road North 1.2 miles to cemetary at church; site just SW of cemetary
Fort Cap Au Gris (1812 Fort site)
South of Winfield, MO dosen't state exactly where.
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Cuivere River State Park
Need permit to detect beach only.
There are alot of old home sites in Lincoln Co.- Always ask permission (TreasureNet mantra)
http://www.lincoln.mo.us.landata.com/
I have heard that Lincoln County is rich in Native American artifacts.
I hope this helps.