> The largest beaver dam on record is in Wood Buffalo National Park in Canada, stretching the length of seven football fields. The dam is so big, it can be seen from space.<p>And from the linked article:<p>> The world’s largest beaver dam is visible from space in satellite images.<p>I would have thought that by now "visible from space" would have lost its charm as a point of comparison. My mailbox is visible from space in satellite images. I have no doubt this dam is too, but that doesn't really mean much at this point.