It's hard to argue with the original. Consider this: If not for Jaws, the idea of a great white shark attack probably wouldn't cross your mind at the beach—they're very uncommon. Decades later, though, our eyes are still peeled for a fin on the horizon.
A realistic take on the Jaws phenomenon (the film is based on a distressing true story), Open Water shows what happens to a couple stranded at sea following a diving trip. Fun? Not really. Horrifying? You bet.
With so much bad press about cruise lines lately, you probably don't need yet another reason to fear ocean liners. However, Ghost Ship's got a few murderous spirits for you to add to your list. Freakier than the not-so-fresh shrimp you grabbed from the buffet, at least.
With all the sharks and ocean beasts lurking in this list, we'd understand if you headed inland for your next vacation. "We're safe in freshwater," you'd think—and then a 30-foot mutant crocodile would gobble you up. Should have gone to Disneyworld.
This is sort of like Jaws for the millennial set: There are sharks, yes, but they're smarter, faster, more lethal after being used in lab experiments for an Alzheimer's drug. Science, you are a cruel mistress.