Not quite "Dragon's teeth"

Like the pyramidal shaped "dragon's teeth"  these large reinforced square concrete blocks were built as part of the defences on the south and east coasts of England and Scotland during WW2.  Hundreds of thousands were built to slow down the expected invasion by tanks and landing vehicles.  Over 70 years old and now eroding, there remain a double row of anti-tank blocks here on the rocky foreshore at the edge of Gosford Bay, with many more in the nearby woods and further along the coast.

(Track 10)