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.
anvil - a heavy block of iron or steel on which hot metals are shaped by hammering. 1  block - a solid piece of something (usually having flat rectangular sides); the pyramids were built with large stone blocks. 2  smithy, forge - a workplace where metal is worked by heating and hammering.