I
- Idaho--Pend Oreille Lake. (1)
- Idaho--Pend Oreille River. (1)
- Idaho--Teton Range. (1)
- Illinois--Alton. (1)
- Illinois--Aurora. (1)
- Illinois--Batavia. (6)
- Illinois--Bloomington. (5)
- Illinois--Braidwood. (1)
- Illinois--Calumet River. (1)
- Illinois--Cayuga. (2)
- Illinois--Chenoa. (2)
- Illinois--Chicago River. (11)
- Illinois--Chicago. (253)
- Illinois--Coal City. (2)
- Illinois--Dixon. (2)
- Illinois--Dwight. (4)
- Illinois--Elmhurst. (4)
- Illinois--Fort Sheridan. (17)
- Illinois--Fox River. (10)
- Illinois--Geneva. (4)
- Illinois--Glen Ellyn. (2)
- Illinois--Illinois River. (1)
- Illinois--Jacksonville. (4)
- Illinois--Joliet. (9)
- Illinois--Kankakee River. (1)
- Illinois--Kenilworth. (1)
- Illinois--La Salle. (3)
- Illinois--Lake Forest. (25)
- Illinois--Lemont. (3)
- Illinois--Lincoln. (3)
- Illinois--Lockport. (7)
- Illinois--Macoupin Creek. (1)
- Illinois--Mazonia. (3)
- Illinois--Mill Creek Park. (2)
- Illinois--Nelson. (3)
- Illinois--Normal. (3)
- Illinois--Pearl. (3)
- Illinois--Pontiac. (5)
- Illinois--Pullman. (5)
- Illinois--Rock Island. (1)
- Illinois--Rock River. (9)
- Illinois--Rockford. (6)
- Illinois--Sangamon River. (1)
- Illinois--Sanitary and Ship Canal. (7)
- Illinois--Springfield. (6)
- Illinois--Starved Rock State Park. (1)
- Illinois--Starved Rock. (4)
- Illinois--Streator. (5)
- Illinois--Summit. (2)
- Illinois--Vermilion River. (4)
- Illinois--Waukegan. (4)
- Illinois--Willow Springs. (1)
- Illinois--Wilmington. (7)
- Illinois. (433)
- India--Agra. (2)
- India--Ganges River. (1)
- India--Hyderabad. (1)
- Indiana--Fort Benjamin Harrison. (1)
- Indiana--Fort Wayne. (1)
- Indiana--French Lick. (1)
- Indiana--Indianapolis. (64)
- Indiana--Tippecanoe Battleground. (3)
- Indiana--Tippecanoe County. (1)
- Indiana--Wabash River. (1)
- Indiana--West Baden. (3)
- Indiana--White River. (3)
- Iowa--Boone County. (1)
- Iowa--Boone. (3)
- Iowa--Boyer River Valley. (1)
- Iowa--Clinton. (1)
- Iowa--Des Moines River. (10)
- Iowa--Des Moines. (11)
- Iowa--Marshalltown. (1)
- Ireland--Kerry. (1)
- Italy--Capri Island. (2)
- Italy--Matterhorn. (2)
- Italy--Milan. (1)
- Italy--Pontine Marshes. (1)
- Italy--Venice. (10)