During the Blitz - the sustained strategic bombing of the UK by Germany that took place between September 7, 1940 and May 11, 1941 - more than 20,000 people were killed and 1.4 million people were left homeless.
Now a team at the University of Portsmouth has developed this interactive map, called Bomb Sight, to give a detailed overview of where the bombs fell.
The team gathered information on all bomb strikes that occurred between October 7, 1940 and June 6, 1941, as recorded in the Aggregate Night Time Bomb Census.
Then they combined that data with geo-located photographs from the Imperial War Museum and memories from the BBC's WWII People's War Archive.
It's not too surprising to learn that building the website (there's an Android app available, too) took a year to build: a massive number of bombs fell on London during the Blitz.
"When you look at these maps and see the proliferation of bombs dropped on the capital, it does illustrate the meaning of the word Blitz, which comes from the German meaning lightning," says Dr. Kate Jones, the University of Portsmouth geographer who came up with the idea for the project.
"It seems astonishing that London survived the onslaught."
You can navigate the map and click on some bomb sights to bring up photographs from the period as well as other contextual material.