Arbor Hill Historic District–Ten Broeck Triangle
Open space within the district include a few vacant lots and parking lots. Most are planned however, such as Van Rensselaer Park, the neighboring space around the church known as St. Joseph's park, and the large parcel at the district's northeast corner where the Ten Broeck Mansion and its gardens (and formerly carriage house) are located. Mature trees are abundant throughout. Topographically the district rises almost a hundred feet (30 m) from its eastern and southern edges to level terrain along North Swan between Second and Third. This reflects the ravines that existed there when Albany was first settled, later partially filled in to facilitate development, now the neighborhood of Sheridan Hollow, which separates Arbor Hill and the district from downtown Albany.
Oak Hill, Austin, Texas
As Oak Hill is not an incorporated community, it does not have any legal boundaries. The community of neighborhoods is centered around the intersection of U.S. Route 290/TX-71 and Williamson Creek, roughly southwest of the center of Austin. The Oak Hill Association of Neighborhoods (OHAN) defines Oak Hill as "...starting from Travis Country in the Northwest, neighborhoods bordering Brodie Lane down to the Travis/Hays County line, following the county line on the south up to Highway 290 West, and then neighborhoods bordering Circle Drive and Thomas Springs Road and finally along the Southwest Parkway." The boundaries defined by OHAN include areas within six ZIP codes and 89 neighborhoods, including Circle C Ranch. However, only 29 neighborhood homeowners' associations are members of OHAN. The city of Austin defines West Oak Hill and East Oak Hill as neighborhood planning areas, encompassing areas adjacent to U.S. Route 290 from Circle Drive to a location slightly east of Texas State Highway Loop 1. Spanning , the neighborhood planning area is Austin's largest.