A pair of Richter Spielgeräte concrete sound mirrors in a small park on the banks of the River Thames at Kew in west London. Photographs taken on 11 March 2018.
Acoustic early warning systems, spectacular remnants of a dead-end technology on the British coast
A pair of Richter Spielgeräte concrete sound mirrors in a small park on the banks of the River Thames at Kew in west London. Photographs taken on 11 March 2018.
