The Mackinac Bridge is five miles long and crosses the Straits of Mackinac, connecting the upper and lower peninsulas of Michigan. It is the longest suspension bridge in North America.
Definition of plinth. 1a : the lowest member of a base : subbaseb : a block upon which the moldings of an architrave or trim are stopped at the bottom. 2 : a usually square block serving as a base; broadly : any of various bases or lower parts.
A block or slab on which a pedestal, column, or statue is placed. 2. The base block at the intersection of the baseboard and the vertical trim around an opening. 3. A continuous course of stones supporting a wall. Also called plinth course.