In an effort to return Washington's White Salmon River to local wildlife, engineers blew a hole in the long-standing Condit Dam. Explains photographer Andy Maser, who shot this dramatic detonation:
The Three Gorges dam on China's Yangtze River, pictured here, is one of the world's great engineering marvels. It's just one of many structures people have built to transform and contain China's massive rivers for the past 2,400 years.
The U.S. Bureau of Reclamation is shooting down a key legislative talking point: that the internet "kill-switch" legislation is needed to prevent cyberterrorists from opening the Hoover Dam's floodgates.
Canada's mighty beavers have been keeping busy. This newly discovered beaver dam, in Alberta's Wood Buffalo National Park, is so big it can be seen from space. Check out some more pics of the 2,788-foot marvel.
No, these aren't tunnels to alternate universes, or a path to your Sideways life: these are spillways, designed to prevent dam erosion.