Away from the waterfront, the streets of the downtown area feature a number of historic buildings that are best visited as part of a guided tour (JUTA is the provider; see page 121).
All of the best historic buildings are located in the downtown area. 
mnli hypothesis: All of the best historic buildings are located in the downtown area.  premise: Away from the waterfront, the streets of the downtown area feature a number of historic buildings that are best visited as part of a guided tour (JUTA is the provider; see page 121).