Last week I made a pilgrimage to Minnesota's @VoyageursNPS, home to America's highest beaver densities.

Any beaver activity is impressive to me. But Voyageurs' dams—well, they're among our most jaw-dropping natural wonders, deserving of international renown.

Time for a thread! First, let's get oriented. We're on the Kabetogama Peninsula, along MN's border w/ Canada—once the route of the Voyageurs, French-Canadian fur traders who almost completely extirpated beavers by the 19th century.

Yeah, I'd say the beavers are back.