The pope (you know, this guy, the leader of the Roman Catholic Church) is pretty busy these days.

Photo from Chris Jackson/Getty Images.

Lately, he's been talking with international leaders, supporting indigenous people's rights, and retrieving his hat from mischievous children. Plus there's that whole being the head of a billion-person-strong religion thing.

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From 1942 to 1944, at least 1.1 million people were killed at the Nazi concentration camp known as Auschwitz.

Many of us learn about this in history class or see the horrifying grainy, black and white photographs of human beings lined up for execution.

Images like those are haunting and important to see, but no experience can come close to actually visiting the camp, which now operates as a memorial to those who were killed inside its gates.

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