Little Mark Island Monument, Stone navigation monument in Northern Casco Bay, Maine, United States.
The Little Mark Island Monument is a pyramidal stone structure standing 50 feet (15 m) tall on a small island near Portland. Black vertical stripes mark each face of the building, making it visible from a distance, while an internal chamber with a steel ladder provides access to the beacon equipment.
This structure was built in 1827 to help ships navigate along the Maine coast. A light signal was added in 1927 to further improve visibility for passing vessels.
This monument belongs to a small group of navigation structures in Maine that reflect how sailors valued clear coastal markings. Visitors can observe how these stone markers still communicate reliability and safety to those passing by water.
The site is best reached when water conditions are calmer, as the island is only accessible by boat. Visitors should be prepared for uneven terrain and steep steps if exploring the interior structures.
The stones used to build this structure came from the island itself, which has an unusual lozenge shape and is completely treeless. This self-sufficiency for building materials was a practical solution for the builders working in such a remote location.
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