SEA FORT: mapped and explained.

Explore quality-approved sea fort records with coordinates, evidence and related unusual places. These are crawlable research records, not an indiscriminate directory: reports without enough depth remain available for exploration but are excluded from search indexing.

SEA FORT · Expanded physical oddities

Fort Louvois

France

fortification built off shore in Bourcefranc-le-Chapus in the department of Charente-Maritime, France

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Trekroner Fort

Denmark

ancient monument in Copenhagen Municipality (151218)

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New Elfsborg Fortress

Sweden

fortress built to defend the city Gothenburg against the Danish fleet

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Horse Sand Fort

United Kingdom

sea fort in the Solent off Portsmouth, Hampshire, England, UK

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Spitbank Fort

United Kingdom

sea fort located in the Solent, near Portsmouth, England

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Fort Mahon

France

fort located on the coast of the Strait of Dover, northern France

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São Marcelo Fort

Brazil

well listed by the Institute of Artistic and Cultural Heritage of Bahia in the city of Salvador, Bahia

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îles Saint-Marcouf

France

group of two small islands off the coast of Normandy, France

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Fort Denison

Australia

heritage-listed former penal site and defensive facility in Sydney Harbour, Australia

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HM Fort Roughs

United Kingdom

Maunsell navy fort off the coasts of Suffolk and Essex, United Kingdom

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Dalarö Fort

Sweden

fort build to protect the inlet to the Stockholm archipelago

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Fort Heath

United States

US seacoast military installation for defense

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Humber Forts

United Kingdom

two sea forts in the Humber Estuary in Northern England, UK

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Pope's Eye

Australia

uncompleted foundation for an island fort at Port Philip, Victoria, Australia

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St Helens Fort

United Kingdom

sea fort with lighthouse in the Solent close to the Isle of Wight, England, UK

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Sindhudurg Fort

India

Island fort in Arabian Sea off the coast of Western India

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Bull Sand Fort

United Kingdom

sea fort in Humber estuary, Easington, East Riding of Yorkshire, England, UK

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Haile Sand Fort

United Kingdom

sea fort in Humber estuary, Tetney, East Lindsey, Lincolnshire, England, UK

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