It is possible to replace a door without replacing the frame. However, most people choose to replace both their door and frame at the same time, as this is likely to make your home security and energy efficiency better, particularly if your existing front door is very old or the frame is distorted.
Munlochy
Munlochy is a tiny remote village, existing at the head of Munlochy Bay (Ob Survey Lochaidh), in the Black Isle in Ross and also Cromarty, in northern Scotland. There are couple of early records of a negotiation, but it promises that Munlochy expanded in the 1760s as a result of quarry workers removing rock close-by to build Ft George beyond of the Moray Firth. Munlochy rests on top of the tidal inlet of Munlochy Bay, that is itself an opening of the Moray Firth.