Which organization ranked Niagara Cave as one of the top 10 caves in the nation?

The organization that ranked Niagara Cave as one of the top 10 caves in the nation is National Geographic. This recognition is significant because National Geographic is known for its expertise in geography, nature, and exploration. The selection by such a reputable source emphasizes the cave's unique geological features, rich history, and the overall visitor experience it offers. National Geographic's endorsement tends to attract both tourists and geology enthusiasts, increasing interest and appreciation for the cave's natural beauty and ecological significance.