"Dinotopia: A Land Apart from Time"@en . "book"@en . "The Great Canal is a canal that bypasses Waterfall City and re-joins the Polongo River below the waterfalls. This is possibly used by boats that obviously cannot go up or down the water falls. Also the Great Canal is used to divert the Polongo River every century or so, so that the bottom of the cliffs, behind the waterfalls, can be rebuilt so that Waterfall City doesn't fall down."@en . "The Great Canal is a canal that bypasses Waterfall City and re-joins the Polongo River below the waterfalls. This is possibly used by boats that obviously cannot go up or down the water falls. Also the Great Canal is used to divert the Polongo River every century or so, so that the bottom of the cliffs, behind the waterfalls, can be rebuilt so that Waterfall City doesn't fall down."@en . "Crawford House Press"@en . . "The Great Canal"@en . . "James Gurney"@en . . .