The only thing better than a haunted attraction is a haunted attraction on a giant boat. You'll find all the usual horrors here—fog, mazes, and now with 33% more monsters!—as well as a vintage Ferris Wheel and a full bar. What sets Dark Harbor apart is its use of its surroundings; the dark, cramped confines of the Queen Mary are already pretty spooky even without monsters—just be prepared to climb a lot of skinny staircases. There's also an R.I.P. Lounge (see what they did there?) if you're looking for a first-class experience (fewer monsters, more booze, made-to-order taco station). Tip: Arrive before 8pm for $20 "Happy Haunting Hour" tickets.