Think water slides are just for kids? Think again.

There are rides out there that are so terrifying, most adults won’t want to set foot on them. They have rip-roaring rapids and 17-story plunges that will send you swerving through pitch-black tunnels at speeds up to 65 mph. Some will drop the floor out from under you. Others will shoot you into a mega-sized funnel of zigzagging rafts. There is one that will propel you directly into a Cobra’s jaws!

Here are some of the scariest water park thrills across the U.S. that are sure to make your stomach drop.