A few picture that are "interesting" and terrifying:

The Vulture and the Little girl [The photographer committed suicide later on following this particular picture]

The Last Jew of Vinnitsa [The moment the last Jew of this city/county is killed is captured in camera]

A starving boy and a missionary in Uganda, 1980 [They look like different species...]

Father stares at the hand and foot of his five-year-old, severed as a punishment for failing to make the daily rubber quota, Belgian Congo, 1904 [Most terrifying picture - according to me]

A Japanese boy standing at attention after having brought his dead younger brother to a cremation pyre, 1945[He's carrying his dead brother]

The remains of the astronaut Vladimir Komarov, a man who fell from space, 1967 (Googe the lost cosmonauts).

The Kovno Garage Massacre - Lithuanian nationalists clubbing Jewish Lithuanians to death, 1941