WW2 GERMAN ‘DRAGON’S TEETH’ ANTI-TANK OBSTACLES These concrete remains are a row of WW2 German ‘Dragon’s Teeth’ – a simple barrier to slow or stop Allied vehicles from accessing areas around important sites. Located in the dune scrubland around 500 metres inland of beachfront bunker site Stp Brunnen – to the south of Boulogne-sur-Mer – you can find two sets of these defences, each with four rows of concrete blocks. There were many types of Dragon’s Teeth created, these look to have been built to