What is associated with: a waterfall on this continent has the longest drop in the world 3212 feet?

Based on the clue 'a water filled barrier around a castle', what is the answer? Based on the clue 'a water snail has these at the base of its tentacl...', what is the answer? Based on the clue 'a water spirit or to put the kibosh on something', what is the answer? What is associated with: a water tower in stanton iowa has been painted like a giant one of these at over 35000 gal tha… Based on the clue 'a waterfall or an opacity of the lens of the eye', what is the answer? Based on the clue 'a waterfall provides only temporary safety from th...', what is the answer? Based on the clue 'a waterfront dive known as jimmy the priests inspi...', what is the answer? Based on the clue 'a watery feed for hogs containing food byproducts', what is the answer?