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  2. List of Illinois area codes - Wikipedia

    en.wikipedia.org/wiki/List_of_Illinois_area_codes

    Shortly after in 1996, area code 773 was created for the residential parts of the city of Chicago, while downtown kept area code 312. Area code 847 exhausted its numbers quickly, so that an overlay area code, 224, was implemented in 1996 for relief. However, mandatory ten-digit dialing was not in effect until 2002. In March 2007, an overlay ...

  3. List of National Historic Landmarks in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_National_Historic...

    Soldier Field (Grant Park Stadium) February 2, 1987: February 17, 2006: Chicago: Cook: Was declared an NHL on February 27, 1987. The designation was withdrawn on February 17, 2006. 2: President: December 20, 1989: July 13, 2011: St. Elmo (formerly) Fayette (formerly) A steamboat, out of service, broken down into pieces, and for sale.

  4. Chicago Heights, Illinois - Wikipedia

    en.wikipedia.org/wiki/Chicago_Heights,_Illinois

    Chicago Heights lies on the high land of the Tinley Moraine, with the higher and older Valparaiso Moraine lying just to the south of the city.. According to the 2021 census gazetteer files, Chicago Heights has a total area of 10.30 square miles (26.68 km 2), of which 10.28 square miles (26.63 km 2) (or 99.87%) is land and 0.01 square miles (0.03 km 2) (or 0.13%) is water.

  5. Anker Site - Wikipedia

    en.wikipedia.org/wiki/Anker_Site

    In 1958 prehistoric remains were uncovered during construction of a subdivision in suburban Chicago.A salvage operation was undertaken under the auspices of the Illinois Archaeological Survey, along with several individuals who excavated some of the burials and features on their own and shared their findings with the Survey.

  6. Kincaid Mounds State Historic Site - Wikipedia

    en.wikipedia.org/wiki/Kincaid_Mounds_State...

    The Kincaid Mounds Historic Site (11MX2-11; 11PO2-10) [3] c. 1050–1400 CE, [4] is a Mississippian culture archaeological site located at the southern tip of present-day U.S. state of Illinois, along the Ohio River.

  7. List of botanical gardens and arboretums in Illinois - Wikipedia

    en.wikipedia.org/wiki/List_of_botanical_gardens...

    Name Image Affiliation City Coordinates Anderson Japanese Gardens: Rockford: Bethalto Arboretum Bethalto: Cantigny: Wheaton: Century Park Arboretum Vernon Hills

  8. Center for American Archeology - Wikipedia

    en.wikipedia.org/wiki/Center_for_American_Archeology

    The Center for American Archeology, or CAA, is an independent non-profit 501(c)(3) research and education institution located in Kampsville, Illinois, USA, near the Illinois River.

  9. Worth Township, Cook County, Illinois - Wikipedia

    en.wikipedia.org/wiki/Worth_Township,_Cook...

    Other township municipalities include Hometown and Merrionette Park, as well as portions of Blue Island, Crestwood, Worth, Palos Heights, Robbins and Bridgeview. Worth Township's approximate borders are Harlem Avenue ( Illinois Route 43 ) on the west, 87th Street on the north, Western Avenue on the east and 135th Street on the south.