daugava's maw

I like it - but what does the title mean/ refer to?

Hi Andy, Vikma19 would be familiar with this place. In late November of 2016 I visited Riga for the first time. Some friends drove me to Vecaki and then it is a lovely brisk walk to a little concrete breakwater at the mouth of the Daugava River which has a little lighthouse at the end of it. it was cold it was slippery it was wet it was exhilarating.