We’ve rounded up a list of holiday must-do’s around in Arapahoe County, including everything from haunted houses and pumpkin patches, to food donations and holiday tree lighting. Haunted houses and corn mazes World’s Scariest Haunted House Denver Colorado Address: 10500 W. Bowles Ave., Littleton Hours: 7 p.m. daily Oct. 6-31 Contact: 720-333-4543 Cost: General admission $18, VIP $25 The scoop: The World’s Scariest Haunted House opened in 2014 and is held at Jared’s Garden and Nursery.