sentence: Unlike many indoor amusement parks, Nickelodeon Universe has a great deal of natural foliage in and about the park, and its floor has a wide variance in height - the highest ground level in the park is 15 feet above the lowest.
modified: fix grammar: Unlike many indoor amusement parks, Nickelodeon Universe has a great deal of natural foliage in and about the park, and its floor has a wide variance in height - the higher ground level in the park is 15 feet above the lower.