The conditional use plan shall incorporate, locate and identify within the development scenic vista points which will remain after construction of the proposed residential dwellings, other permitted uses, and related site improvements, and which will provide visual amenities to the development. Vista points may include unobstructed views looking into the development from adjacent public roads and unobstructed views within the development, each incorporating open space and/or other preserved natural features. The number of vistas shall be dependent upon the final design of the development, the tract size, and natural land features, and shall be subject to the reasonable discretion of the Board based upon those factors, provided approval shall not be withheld if the development meets the applicable objective criteria of this chapter and Chapter 310, Subdivision and Land Development, of the Code and provision is made for a reasonable number of scenic vistas within the development based upon the foregoing factors.