The harbor in Portland, Maine, has been a commercial center since the 1700’s. And now the harbor front is full of shops and restaurants for the tourists.
One of the tours one can take is the Duck Tour. This is an amphibious drive/cruise in a specially-built bus version of a WW2 landing craft.
Some photos.
For those who don't know, I live in a converted campervan and am traveling around the country, posting photo diaries of places that I have visited. :)