The UN General Assembly designated January 27th, as International Holocaust Remembrance Day thirteen years ago. The date is the anniversary of the liberation of Auschwitz Concentration Camp. About 1.5 million people were brutally massacred at the notorious camp, most in gas chambers. Now every January, people come to Auschwitz from around the world to commemorate the victims and learn lessons on holocaust history.

In 1947, the Auschwitz-Birkenau Memorial and Museum was founded on the site of the former Nazi concentration camp. It features displays of 40-thousand pairs of shoes, seven tons of hair, various kinds of suitcases and gas chambers. All the exhibits are chilling.

OFFICIAL AUSCHWITZ-BIRKENAU MEMORIAL AND MUSEUM "Here you can see the original room, 22 toilets and uranium for the entire building. When you look at the empty space like this, it's sometimes difficult to use your imagination. But we need to remember inside the building like this, sometimes even 1,000 people slept."

70 percent of visitors to Auschwitz are youngsters from around the world. They come to learn the truth about Holocaust history.

DUTCH VISITOR "Everyone should know, especially people who denied this."

GE YEYE CHINESE VISITOR "I've seen the gas chamber and victims' rooms. The majority of victims were murdered before their bodies were burned. This concentration camp was called the Death Factory. This museum reminds us that we should remember its history and avoid such horrors from ever happening again."

73 years have passed. But the dark days at Auschwitz still resonate. This museum serves as a reminder of the terror and suffering of the camp's victims. It ensures one of the darkest chapters of mankind will never be forgotten. CGTN.