Right next to the Sand Ski Hill down a steep set of stairs, you will come to another one of Shimoda’s natural wonders. It is a massive cave naturally carved out by blowing wind, sand, and water. It is open on the top and has a passage out to the sea. You can also walk around the top of the cave for some mesmerising ocean views. The Cave and Sand Ski Hill are about a 15 minute or 20 walk from Retreat wabi-sabi.