Goalkeeper Joe Hart stressed the importance of England's trip to Auschwitz on Thursday, revealing his father had urged him to travel to the site.
"Ever since Krakow was chosen as the venue, he said, 'You need to go and do this, go and see, experience it'," Hart said.
"It's hard. I'm not being sick or perverse. You need to see these things to appreciate them.
"It's talked about and you hear people chuck words like 'Holocaust'.
"You need to know what they are. It gives you more of a feeling of the history of this world."
An estimated 1.3 million people were killed at Auschwitz-Birkenau of which 90 percent were European Jews.