The Secret Museum of Mankind is a bit like a National Geographic written by Nazis. It's racist, exaggerated, and often total bullshit, but still an incredible collection of photos of tribes from across the continents. Published in 1935, the pictures are accompanied by hammy captions that convey the prejudices of that time (basically that non-Europeans were all savages). See below for a selection of images that show "the magic and mystery in queer lands where the foot of a white man has rarely tread..."
* All 564 pages from the five volumes of The Secret Museum of Mankind have been scanned, transcribed and uploaded HERE.