Sinister Valley Haunted House. Come test your courage this year at Sinister Valley’s biggest Haunt yet! If you’re lucky enough to survive the Swamp Graveyard, you’ll embark into a truly Haunted House. A tip; Don’t anger the little girl that used to live there! Assuming you’re the lucky one in your group to survive, you’ll head underground for a truly explosive experience! But be careful, you won’t be alone in the depths of the mine! $12 on Thursdays and Sundays, $15 on Fridays and Saturdays. Tickets online or onsite at Vail Headquarters, 32115 Temecula Parkway, Temecula. Information: www.sinistervalley.com.