The World's Second Best Walk-Through Haunted Mansion at an Amusement Park. It is located in Monticello, Indiana at Indiana Beach Amusement Park. Indiana Beach Amusement Park has been open for around 80 years and one of the oldest parks in the United States. Haunted House used to have dressed up workers that scared people through the House, but now uses Animation Figures (by the Disney Company) along with some original features.