According to the search results, the rides that are open during Halloween Haunt vary depending on the amusement park. Here is a list of the rides that are open during Halloween Haunt at each park:

• Worlds of Fun: Fury of the Nile, Grand Carousel, Skyliner, Viking Voyager, Worlds of Fun Railroad.
• Kings Island: Orion, Banshee, Diamondback, Mystic Timbers, The Beast, and other thrilling rides and attractions.
• Kings Dominion: A horrific lineup of thrilling rides, haunted mazes, spine-tingling scare zones, and the spookiest live shows.
• Canadas Wonderland: A variety of rides and attractions, but the specific rides that are open during Halloween Haunt are not listed.
• Dorney Park: Antique Carousel, Apollo, Cedar Creek Flyers, Demon Drop, Dodgem, Dominator, Enterprise, Ferris Wheel, Hydra, Kaleidoscope, Monster, Musik Express, Possessed, Revolution, Scrambler, Sea Dragon, Steel Force, Talon, Thunderhawk, Tilt-a-Whirl, Wave Swinger, Whip, Wild Mouse, and other rides.

Its important to note that ride availability is subject to change at any time, so its best to check with the amusement park directly for the most up-to-date information.