Dover, ME —– County Fair.
Published: Hugh C. Leighton Co., Portland, ME (1904-09)
Dated 1920
Maine
Riverton Casino, Portland
Red Room Riverton Casino
Greetings from Portland, Maine
1904-1907
The writing on the card is the message written by the sender. Early postcards only allowed the address to be written on the back. This changed in the US in 1907. The publisher of the card (Hugh G. Leighton) was apparently only in operation from 1904 to 1909 (reference).
Penobscot River, Maine
Penobscot River from Brewer Ferry Slip, Bangor, Maine.
c.1911
Publisher: Curt Teich
Google Street View (approximate). There’s not many riverside locations along here on Street View but, as best I can tell, that’s looking towards the site of Bangor’s Union Station (demolished), the tower in the postcard, from Brewer.