Clay County Indiana (Vacant / Not In Use) has 2 places on the National Register of Historic Places.
Some of the country's most noteable architects helped create the Clay County places including Cleveland Bridge and Iron Company, Vincennes Bridge Company, Hunt, C.F. and Company. Prominent architectural styles found in Clay Country are .
Aqueduct Bridge
(added 2000 - - #00000209)
Also known as Clay County Bridge # 182, Coffey Bridge