This chilling drone video was shot by the BBC and shows the enormity of the Auschwitz-Birkenau concentration camp as it is today – over 70 years after it was liberated by Soviet soldiers. The camp in Poland is now maintained as a World Heritage Site and thousands of tourists and survivors visit it every year.

Auschwitz was the largest concentration camp established by Nazi Germany during the Second World War. Over a million people – most of them Jews – were murdered there between 1940, when it was built, and 1945, when the Soviet Army liberated it.

In this video you will see: