Cromwell's Castle, Artillery fort on Tresco, Isles of Scilly, United Kingdom.
The circular stone tower rises 15 meters high on a rocky promontory, featuring thick walls and multiple gun ports overlooking New Grimsby harbour.
Sir Robert Blake constructed the defensive tower between 1651 and 1652 following the Parliamentary invasion of the Isles of Scilly during the English Civil War.
The fortress represents military engineering from the Interregnum period, with its design focused on preventing enemy naval vessels from entering the strategic harbour.
The castle remains open to visitors throughout the year during daylight hours, with access only possible through a footpath along the shoreline.
The fortress contains a three-story circular tower with walls four meters thick, built using stones from the ruins of King Charles's Castle.
Location: Tresco
Website: https://english-heritage.org.uk/visit/places/cromwells-castle
GPS coordinates: 49.96220,-6.34948
Latest update: March 6, 2025 04:00
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