Auschwitz 1: Block 10

Block 10 is where SS doctors supposedly carried out experiments on prisoners.
Access is denied to Block 10 as of Jan 2012

Block 10 on the left, with the enclosed yard between it and Block 11,
the camp prison, inside the yard is the Wall of Death

The Nazis did indeed sterilize people at Auschwitz, intercepted messages
prove it, unfortunately for Holocaust promoters; they don't prove gassings

Block 10a entrance (the first floor)

Rears of Block 10 (right) Block 11 (left) and the Wall of Death in the middle 

Block 10 (left) with all the windows boarded-up