1. The phrase "trick or treat!" first began in Alberta.
2. The world's longest beaver dam is in Wood Buffalo National Park and measures 850 metres (or 2,790 feet) long.
The enormity of the dam wasn't noticed until someone spotted in on Google Earth in 2007, but apparently several generations of beavers have worked on the dam since 1975. The dam beat the previous record set by one in Three Forks, Montana, which was 652 metres (or 2,140 feet) long. Suck it, Montana!