Overnight Investigations in Illinois
Ranked from the documented sites in the Illinois index: 10 sites offering a bookable overnight paranormal investigation. Updated September 2026.
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Grants overnight or private investigation access (up to 4 hours). HauntBound identified two distinct published accounts at this historic home. Four later publications retell those accounts. Reported phenomena include apparitions and cold spots.
Dates: Sept 26 and Oct 10· · verified September 2026 Book this investigation -
Grants overnight or private investigation access (up to 10 hours). HauntBound identified four distinct published accounts at this former hospital site, across six kinds of published source. Five later publications retell those accounts. Reported phenomena include apparitions and cold spots.
Dates: Nov 21· · verified September 2026 -
Grants overnight or private investigation access (up to 12 hours). HauntBound identified three distinct published accounts at this historic home, across five kinds of published source. Four later publications retell those accounts. Reported phenomena include cold spots and disembodied voices.
Check for dates· · verified September 2026 Check availability -
Grants overnight or private investigation access (up to 10 hours). Five independent sources document this museum site, with a history reaching back to 1827. Reported phenomena include apparitions and cold spots.
By appointment· · verified September 2026 Check availability -
Grants overnight or private investigation access (up to 16 hours). Three independent sources document this historic home, with a history reaching back to 1867. Reported phenomena include apparitions and cold spots.
Check for dates· · verified September 2026 Check availability -
Grants overnight or private investigation access (up to 6 hours). Three independent sources document this former hospital site, with a history reaching back to 1902, and two independent books, broadcasts, or markers cover its reports. Reported phenomena include apparitions and disembodied voices.
Dates: Nov 21· · verified September 2026 -
Grants overnight or private investigation access (up to 6 hours). Four independent sources document this historic home, with a history reaching back to 1901. Reported phenomena include apparitions and disembodied voices.
Booking now· through Oct 17· verified September 2026Seasonal: Sept 12 to Oct 17 Book this investigation -
Grants overnight or private investigation access (up to 6 hours). Three independent sources document this former prison, with a history reaching back to 1905. Reported phenomena include cold spots and disembodied voices.
Check for dates· · verified September 2026 Check availability -
Grants overnight or private investigation access (up to 6 hours). Three independent sources document this working theater, with a history reaching back to 1916. Reported phenomena include apparitions and cold spots.
Check for dates· · verified September 2026 Check availability -
Runs hosted after-hours investigations inside the building (up to 4 hours). HauntBound identified two distinct published accounts at this former hospital site, across four kinds of published source. Four later publications retell those accounts. Reported phenomena include apparitions and cold spots.
Dates: Nov 28· · verified September 2026