 The East and West Blockhouses were Device Forts built by King Henry VIII in 1539 to protect the harbour of Milford Haven in Wales . The two blockhouses were positioned on either side of the Milford Haven Waterway in the villages of Angle and Dale respectively , overlooking the sea . The East Blockhouse was never completed , but the remains were reused as a gunpowder store in 1642 .
 surely the most famous blockhouse in Wales.
The East Blockhouse was built by Henry VIII to protect the harbour of Milford Haven in Wales . The two blockhouses were positioned on either side of the Milford Haven Waterway