Nightmare Island in Vallejo, CA is a terrifying haunted house experience located on Mare Island. With a 45,000 square foot warehouse transformed into a spine-chilling attraction, visitors can expect a rollercoaster of frights in this open-air setting.
Open every Friday, Saturday, and Sunday in October, Nightmare Island offers a hair-raising adventure with its additional 900 sqft of haunt, promising a truly terrifying experience for those brave enough to enter.
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