The three rivers (The Allegheny, the Ohio and the Monongahela) meet in Pittsburgh.
Those boats are pretty interesting. How are they made?
Right now, I am almost on the diametrically opposite side of the globe from Pittsburgh One of the rivers is Kaveri, a major river in south of India. I don't know the others, some obscure minor ones. The boat is made by weaving thin strips of bamboo.