The world's tallest water slide is about to open in Kansas City, MO at the Schlitterbahn Kansas City Waterpark. To ride Verrückt, riders climb 264 steps to the top before being strapped into a raft ("NO Wedgies!") and plumetting seventeen stories. Statue of Liberty for scale. The current (tentative) opening date is June 5, 2014. Cheesy promotional video.
Someone went to the trouble of building a waterslide for cute fuzzy baby ducks. Spoiler: the ducklings love it! (SLYT)