From the World Heritage inscription:
Old Town Lunenburg is the best surviving example of a planned British colonial settlement in North America. Established in 1753, it has retained its original layout and overall appearance, based on a rectangular grid pattern drawn up in the home country. The inhabitants have safeguarded the town’s identity throughout the centuries by preserving the wooden architecture of the houses and public buildings, some of which date from the 18th century and which constitute an excellent example of a sustained vernacular architectural tradition. Its economic basis has traditionally been the offshore Atlantic fishery, the future of which is highly questionable at the present time.
Lunenburg is a quaint, old fishing village about an hour south of Halifax, Nova Scotia. In addition to being a colonial town, it was also where Norwegian Sailors trained in WWII to take back Norway. From what I was told on Twitter, I just missed Kevin Costner by a few days.
View my complete list of UNESCO World Heritage Sites