I stumbled upon a site called World’s Famous Photos, which starts out just enthralling and slowly becomes agonizingly depressing.

You might first get drawn to some particularly iconic historical photographs, like Raising the Flag on Iwo Jima or “Tank Man” in Tiananmen Square.  You might peek in on the lighter fare like the cover of Abbey Road or V-J Day in Times Square.

But in the end you won’t be able to avoid the September 11 attacks, the Oklahoma City bombing, and the wars, famines, fires, protests, and genocides that a century of photography has recorded and that now sit arrayed before you on your computer screen just waiting to be absorbed.