The Hickory Hill mansion was built in 1842 by a wealthy man, John Hart Crenshaw, who owned several salt tracts. Although it was illegal to own slaves in Illinois at this time, it was legal to lease slaves from other states to work in the salt mines.

Crenshaw imprisoned slaves, some of whom were kidnapped, in the attic of the mansion in narrow cells and manacles. He reportedly tortured and beat the slaves for many years, and also "bred" his own slaves, until eventually his cruel practices were discovered and he retired to become a farmer.

In the 1920s, the house was opened as a tourist attraction where slavery existed in Illinois, however tourists began reporting sounds of people crying and moaning coming from the attic, cold chills, and whispers. Things intensified when a ghost hunter named Hickman Whittington went to the attic shortly after it opened and spent a few hours there. Though he was in perfect health at the time, he died a few hours after leaving the mansion.

Reportedly, hundreds of people tried to spend the night in the attic after Whittington's death, but would leave, terrorized, before morning (one man did finally spend the night there in 1978, and reported strange sounds).

Currently, the Hickory Hills mansion is owned by the state of Illinois, and is scheduled to open as a historic site (but has not yet re-opened to visitors).