What It Looks Like Inside the World’s Largest Underground Cave Waterfall https://cdn1.matadornetwork.com/blogs/1/2024/04/Ruby-Falls.jpg' class='webfeedsFeaturedVisual'></figure>It's accessible by a glass elevator that descends hundreds of feet into the earth. It's accessible by a glass elevator that descends hundreds of feet into the earth. https://matadornetwork.com/read/ruby-falls/