Kentucky Tourism
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The Ohio River marks Kentucky's northern border with Ohio, Indiana and Illinois (more than 600 miles).

In his Notes on the State of Virginia published in 1781-82, Thomas Jefferson stated: "The Ohio is the most beautiful river on earth. Its current gentle, waters clear, and bosom smooth and unbroken by rocks and rapids, a single instance only excepted."  That one exception is the Falls of the Ohio at Louisville, Kentucky.  The falls is a 2.2-mile-long limestone rapids where the river drops 23.9 feet. Canalization around the rapids was completed in 1830, ensuring navigability.

Five major Kentucky cities lie on the Ohio:  Ashland, Covington, Louisville, Owensboro, and Paducah.