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.
monolith (plural monoliths) 1  A large single block of stone, used in architecture and sculpture. 2012 January 1, Henry Petroski, âThe Washington Monumentâ, in American Scientist, volume 100, number 1, page 16: The Washington Monument is often described as an obelisk, and sometimes even as a âtrue obelisk,â even though it is not.