London, England, United Kingdom
The round stone in the roadway opposite this point marks the spot where on Wednesday the 18th December 1917, at 8-10 P.M. a bomb from a German aeroplane struck the ground and exploded, shattering the windows in Stone Buildings and doing other material damage. — Lincoln's Inn
Listen to the audio guide for Stone Buildings bronze plaque Free on WIP — starts by itself when you arrive, even with the screen off