A Henry VIII device fort on Southsea's seafront, with a lighthouse and a museum inside.
Get directionsBrian Kidd Way, Portsmouth, PO5 3PA
Henry VIII's Device Forts programme produced the castle, built in 1544.
A lighthouse was added to the western gun platform in 1828 and stayed in use until 2017; the original lens is displayed inside.
The castle served as a military prison from 1844 to 1850, holding 150 offenders, and has been a museum since 1967.
Brian Kidd Way, Portsmouth, PO5 3PA
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