Northern Michigan Attractions: Treat your family to a tricky Halloween weekend at Boyne's Avalanche Bay Water Park. Tremble in the haunted hallway, hop on a hayride, join in the great pumpkin race and take a scenic chairlift ride. Oh, and don't forget your bathing suits because the waterpark is free after 4 p.m. on your day of arrival.  Starting at $132 per night. Click to book your ghoulishly fun weekend.

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