User blog comment:Boomblox4/Club Penguin & Club Penguin Wiki Recaps!/@comment-1176146-20100121220958

Here's what I think about the Cavern:
 * It's the future Water Dojo.
 * The Mine enterance will be closed on 28th, but you will be able to enter it from the Ninja Hideout.
 * Since a few weeks ago, the waterfall that can be seen at the Dojo Courtyard started to flow faster, and a waterfall can be seen in the What's New Blog's sneak peek.