Reelfoot Lake is a shallow natural lake located in the northwest portion of the U.S. state of Tennessee, in Lake and Obion Counties. Much of it is swamp-like, with bayou-like ditches (some natural, some man-made) connecting more open bodies of water called basins, the largest of which is called Blue Basin. Reelfoot Lake is noted for its bald cypress trees and its nesting pairs of bald eagles.