Access unclearno public right of way confirmed — check locally before setting out
Substantial ruinsruined, but plenty survives above ground
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Fort Blockhouse is an artillery fort in Hampshire. It is one of three artillery forts the Albion Guide charts in the county. The nearest railway station, Portsmouth Harbour, is under a kilometre away. Southsea Castle and Fort Brockhurst are among the castles within 4 km.
More at the National Heritage List entry