In 1987, UNESCO accorded World Heritage status to the entire city of Bath. While hundreds of cities throughout the world have designated world heritage sites, I believe Bath and Venice are the only 2 cities where the entire city, is so designated.
Venice is an easy one to understand, as we probably all know about the canals, and many may have actually visited the city, but Bath? Unless you are from UK, or have studied UK history, you may not be aware of this beautiful city.