Anchorage, Alaska sits on a wide peninsula. To the North is Knik Arm because the Knik River flows into it. To the south is Turnagain Arm because it is very shallow and Captain Cook had to "turn again" when searching for the Northwest Passage. The mudflats, though beautiful, are treacherous and people have died walking on them as the incoming bore tide roared in. Though generally a gray color from the glacial flour slit deposited over eons, the clouds and position of the sun made them blue this day. No Photoshopping here except cropping and a change to sunset setting for one of them.