Forest Preserve District of Cook County

Marshall Field and Company Store is a building in Oak Park, Illinois that was added to the National Register of Historic Places on January 21, 1988. It is one of the two locations (along with the Evanston location) that the company chose to expand to when it decided to add suburban stores. The store is a miniature replica of the Marshall Field and Company Building in the Chicago Loop and a twin of the Evanston store.The building served as a Marshall Field's store from its opening until 1986, when Marshall Field's then-owner BATUS Inc. closed it because it was deemed out of date and too costly to operate. The building housed a Borders book store, until all the locations were closed in 2011. Today, it houses several offices.

Harlem Avenue/Lake Street, announced as Harlem, or Harlem/Lake, is a station on the Chicago Transit Authority's 'L' system, serving the Green Line. It is the northwestern terminus of the Green Line.

Forest Park was an at-grade station on the Chicago Transit Authority's 'L' system, serving as the former western terminus of the Lake Street Elevated.

The Harlem Yard is a CTA rail yard in Forest Park, Illinois which stores cars for the Green Line of the Chicago Transit Authority. Currently, 5000-series railcars are stored here. It is adjacent to Harlem/Lake station.

Oak Park is a Metra commuter railroad station in Oak Park, Illinois, just west of Chicago. It is served by Metra's Union Pacific West Line, with service east to Ogilvie Transportation Center in Chicago and as far west as Elburn, Illinois. Travel time to Chicago is 16 to 20 minutes. As of 2022, Oak Park is served by 18 of 20 trains in each direction on weekdays, by all 10 trains in each direction on Saturdays, and by all nine trains in each direction on Sundays and holidays. As of 2018, Oak Park is the 52nd busiest of the 236 non-downtown stations in the Metra system, with an average of 991 weekday boardings. It is the final stop for most UP/West trains before the terminus at Ogilvie Transportation Center. The station is located along North Boulevard between Marion Street and Harlem Avenue, Oak Park's western border with River Forest and Forest Park. The Chicago Transit Authority's Green Line ends at Harlem/Lake and is connected directly to this station at Marion Street. Downtown Oak Park, which includes a large shopping district spread over both Oak Park and River Forest, is nearby with many stores centered on Harlem Avenue and Lake Street.

The Edward R. Hills House, also known as the Hills–DeCaro House, is a residence located at 313 Forest Avenue in the Chicago suburb of Oak Park, Illinois. It is most notable for a 1906 remodel by architect Frank Lloyd Wright in his signature Prairie style. The Hills–DeCaro House represents the melding of two distinct phases in Wright's career; it contains many elements of both the Prairie style and the designs with which Wright experimented throughout the 1890s. The house is listed as a contributing property to a federal historic district on the U.S. National Register of Historic Places and is a local Oak Park Landmark. Since construction, the home has undergone many changes. During the 1906 remodel, the original late 19th century Stick style structure was moved and essentially completely rebuilt. Alterations carried out between 1912 and 1965 obscured some of Wright's intended design. In 1976, a major fire destroyed or damaged much of the house. The house was immediately reconstructed and partially restored. This was furthered by another partial restoration by the current home owners. As a result of the remodels, the house today bears the work of at least four different architects. The house remains a private residence, but it is occasionally opened for special tours.

The Thomas H. Gale House, or simply Thomas Gale House, is a house located in the Chicago suburb of Oak Park, Illinois, United States. The house was designed by famous American architect Frank Lloyd Wright in 1892 and is an example of his early work. The house was designed by Wright independently while he was still employed in the architecture firm of Adler & Sullivan, run by engineer Dankmar Adler and architect, Louis Sullivan; taking outside commissions was something that Sullivan forbade. The house is significant because of what it shows about Wright's early development period. The Parker House is listed as contributing property to a U.S. federally Registered Historic District. The house was designated an Oak Park Landmark in 2002.

The Walter H. Gale House, located in the Chicago suburb of Oak Park, Illinois, was designed by Frank Lloyd Wright and constructed in 1893. The house was commissioned by Walter H. Gale of a prominent Oak Park family and is the first home Wright designed after leaving the firm of Adler & Sullivan (run by engineer Dankmar Adler and architect, Louis Sullivan). The Gale House was listed on the U.S. National Register of Historic Places on August 17, 1973.

The Frank W. Thomas House is a historic house located at 210 Forest Avenue in the Chicago suburb of Oak Park, Illinois, United States. The building was designed by architect Frank Lloyd Wright in 1901 and cast in the Wright-developed Prairie School of Architecture. By Wright's own definition, this was the first of the Prairie houses - the rooms are elevated, and there is no basement. The house also includes many of the features which became associated with the style, such as a low roof with broad overhangs, casement windows, built-in shelves and cabinets, ornate leaded glass windows and central hearths/fireplaces. Tallmadge & Watson, a Chicago firm that became part of the Prairie School of Architects, added an addition to the rear of the house in 1923.On September 14, 1972, the Frank Thomas House was added to the U.S. National Register of Historic Places.

The Francis J. Woolley House is located in Oak Park, Illinois, United States, a Chicago suburb. The house was designed by American architect Frank Lloyd Wright in 1893. The Queen Anne style home is reflective of Wright's early designs for lower-cost, more affordable housing. The Woolley House is similar to the trio of homes in Oak Park that are widely known as the "bootleg houses." The design is heavily influenced by Wright's first teacher, Joseph Silsbee, and the Arts and Crafts movement. The house is listed as a contributing property to a local and federal historic district.

The Nathan G. Moore House, also known as the Moore-Dugal Residence, is a house designed by Frank Lloyd Wright. The house was built one block south of Wright's home and studio at 333 Forest Avenue in the Chicago suburb of Oak Park, Illinois. It was originally completed in 1895 in the Tudor Revival style at the request of client Nathan Moore. Wright obliged his client's wishes, but long after disliked the house for its adherence to historical styles. A 1922 fire gave Wright the opportunity to redesign the house. The structure was completely rebuilt above the first or lowest floor in a manner in keeping with Wright's other works of the late 1910s and early 1920s. While the new design stayed evocative of Tudor architecture, the house was heavily ornamented by details of Sullivanesque, Mayan, and other exotic origins. Wright's second scheme remains largely intact today and the house continues to be a private residence despite a brief period as a tour home.

The Peter A. Beachy House is a home in the Chicago suburb of Oak Park, Illinois that was entirely remodeled by architect Frank Lloyd Wright in 1906. The house that stands today is almost entirely different from the site's original home, a Gothic cottage. The home is listed as a contributing property to the Frank Lloyd Wright-Prairie School of Architecture Historic District, which was listed on the U.S. National Register of Historic Places.