Klondike is a neighborhood in eastern Louisville, Kentucky, United States.
 Due to being on the edge of the old city limits, its boundaries are irregular, it is west of Hikes Lane and South of Breckenridge Lane.
 Development began after World War II, with developers Edward Butler and Chester Cooper purchasing and subdividing 45 acre of the Graff farm and part of the Hikes family's Midlane farm.
 The area is primarily residential and includes Klondike Park, from which the neighborhood derives its name.
 Local legend is that the park was named after Frank Bumann, a prospector from the Yukon who opened the park.
Mission Bay is a 303 acre neighborhood in San Francisco, California.
 It is the home of the Chase Center (San Francisco) that will open in 2019.
 It is located on the east side of the city, outside Downtown San Francisco.
 Mission Bay is a sub-neighborhood of SoMa and borders China Basin to the north and Dogpatch to the south.
 Originally an industrial district, it underwent development fueled by the construction of the UCSF Mission bay campus, and is currently an up and coming neighborhood, undergoing development and construction.
The Southern Exposition was a five-year series of World's fairs held in the city of Louisville, Kentucky, from 1883 to 1887 in what is now Louisville's Old Louisville neighborhood.
 The exposition, held for 100 days each year on 45 acre immediately south of Central Park, which is now the St. James-Belgravia Historic District, was essentially an industrial and mercantile show.
 At the time, the exposition was larger than any previous American exhibition with the exception of the Centennial Exposition held in Philadelphia in 1876.
 U.S. President Chester A. Arthur opened the first annual exposition on August 1, 1883.
Groesbeckville is a former a hamlet in the town of Bethlehem outside the city limits of Albany, New York.
 The hamlet was named for a prominent Albany family, the Groesbecks.
 It has been a part of Albany's South End neighborhood since being annexed in 1870.
 It was made part of the South End-Groesbeckville Historic District.
The Spencer Town Center Historic District encompasses the historic downtown of Spencer, Massachusetts.
 When first listed on the National Register of Historic Places in 1986, the district covered 250 acre centered on Main Street between High and North Streets.
 A major expansion, the East Main Street-Cherry Street Historic District, added 45 acre of a predominantly residential area east of the center.
 The district was expanded twice in 2003, adding residential areas along Grove, Prouty, Pleasant, High, and Main Streets, and industrial areas on Cherry, Wall, and Mechanic Streets, as well as Luther Hill Park.
 The main period of historic interest is the peak period of Spencer's industrial history in the last quarter of the 19th century, although there are a significant number of properties that predate this period.
The Mansion Historic District, sometimes referred to as Mansion Hill, is located south of Empire State Plaza in Albany, New York, United States.
 It takes its name from the nearby New York State Executive Mansion, which overlooks it.
 It is a 45 acre , 16-block area with almost 500 buildings.
 Many of them are rowhouses and townhouses built in the middle and late 19th century that remain mostly intact today.
Winter Island is an island connected by a causeway to Salem Neck in Salem, Massachusetts.
 It is about 45 acre in size, and is bounded by Smith Pool to the northwest, Cat Cove to the west, Salem Channel to the south and east, and Juniper Cove to the north.
 The island has about a dozen residences at the north end and one road, Winter Island Road.
 The Plummer Home for Boys sits on 18 acre of land on the northeastern shore.
 The balance of the island is Winter Island Marine Park.
 The entire island was added to the National Register of Historic Places as Winter Island Historic District and Archeological District in 1994.
Ferger Place Historic District in Chattanooga, Tennessee was founded in 1910 as the first gated community south of the Mason-Dixon line.
 Founded by two wealthy investors, the Ferger Brothers, Ferger Place attracted higher class families including wealthy businessmen and Government officials.
 Off of main street in east downtown Chattanooga, this 240 acre neighborhood includes a wide spectrum of architectural styles of homes and welcomes newcomers to its safety oriented community.
 Making up both Morningside and Eveningside Drives, the homes reflect an array of styles ranging from 1910 through the 1930s.
 The Historic Neighborhood is also known for its distinct 'U' shape of 69 beautiful homes.
 This neighborhood was especially attractive because of the industrial revolution that spread throughout the nation at the beginning of the 20th century.
The South End–Groesbeckville Historic District is located in part of the neighborhood of that name in Albany, New York, United States.
 It is a 26-block area south of the Mansion and Pastures neighborhoods with a mix of residential and commercial properties.
 In 1984 it was recognized as a historic district and listed on the National Register of Historic Places.
The Lower Commerce Street Historic District is a 45 acre historic district in the old commercial district of Montgomery, Alabama.
 It includes fifty-two contributing buildings.
 It is roughly bounded by the Central of Georgia railroad tracks, North Lawrence Street, Madison Avenue, and Commerce Street.
 Architectural styles in the district include the Italianate, Classical Revival, and Renaissance Revival.
 It was placed on the National Register of Historic Places on March 29, 1979, the boundaries were subsequently increased on February 25, 1982 and January 15, 1987.

Question: What 45 acre neighborhood is north of the South End-Groesbeckville Historic Distric?
Answer: The Mansion Historic District