Boston’s Great Molasses Flood of 1919
"On January 15, 1919, Boston suffered one of history’s strangest disasters: a devastating flood of molasses. The “Great Molasses Flood” tore through the North End and deposited so much gooey residue that locals claimed they could still smell the molasses on warm days decades later. Let’s take a look at this odd, tragic story."
For more about this trajedy and molasses see "The great molasses tragedy!"
via mentalfloss.com