Overton Bridge in Dumbarton, Scotland, was designed by renowned architect Henry Ernest Milner and built in 1895. More than 600 dogs have already jumped from this bridge since the 1950s.

About 50 of them found their death and those who didn't - came back to try again. Researchers are trying to decipher what exactly makes dogs jump off the bridge: is it witchcraft? A ghost pushing them to their deaths? Or is there something else under the bridge that piques the curiosity of the poor dogs?