Science & Tech
Martin's Mill Covered Bridge in Antrim Township, Franklin County, Pennsylvania, is a historic wooden bridge built in 1849 to carry a road over Conococheague Creek. Its 205-foot Town lattice truss reflects a 19th-century design distinguished by a crisscrossed web of timber members. As one of Pennsylvania's surviving covered bridges, it remains in public use as a crossing open from dawn to dusk. Its significance as a preserved example of early bridge engineering was officially recognized in 1974 with its listing on the National Register of Historic Places.
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Pennsylvania · United States
