The beavers of Raymond Brook Marsh construct dams to hold back water; that's common enough and easy to see. Less obvious is the culvert they manage under the trail to channel water from the high side to the low. But each fall a whirlpool appears in the marsh at the entrance to one of these culverts from the railroad era. It remains open through early spring. Click on the still images below to download QuickTime video clips, with audio, of the whirlpool in two different years.

March 30, 2004

Morning- backlit

Late afternoon - polarizing filter

December 2, 2006