Thunder Hole is neat! The waves come into the inlet in such a way, that it sounds like thunder at times. When we got there, there was another couple already there, but we had the place mostly to ourselves.
We could hear the thunder while we walked, but once we got there it was much better. We stayed and enjoyed the noise and watching the water spray for quite a long time before moving on.
On the way back to the car, there were a lot of people and the thunder was much softer. We think we missed the best noise by just a little bit. We hoped to return another day, but we ran out of time. It is on our wish list for a future visit.