Confusion Hill, Optical illusion amusement park in Piercy, California, United States.
Confusion Hill is an optical illusion amusement park in Piercy, California, focused on playful experiments with gravity and perspective. The Gravity House features tilted floors and skewed walls that produce puzzling visual effects.
The park opened in 1949 along the Pacific Coast Highway and received recognition as a California State Point of Historical Interest in January 2010. This designation honors its role in American roadside attraction history.
The attraction preserves midcentury American roadside entertainment traditions and displays the world's largest freestanding chainsaw-carved redwood totem pole. This handcrafted woodwork reflects regional logging heritage along the highway corridor.
The site sits about 25 miles (40 kilometers) south of Avenue of the Giants and offers a miniature train ride, gift shop, and playground. The facility suits families with children and allows for roughly an hour-long visit.
Visitors witness phenomena where balls seem to roll uphill and people stand at impossible angles. These effects result from deliberately engineered architectural illusions within the tilted building.
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