Last year when we went on our cruise to Mexico, we went to Ensenada where the locals proudly proclaimed that they had one of only two blowholes known in the world -- what they proudly call La Bufadora (the, um, "blowhole"). We were skeptical, and quickly found out that that the locals were, um, blowing smoke. There's at least a dozen good-sized blowholes around the world, and we discovered a small one we didn't previously know about on Maui (not the Nakalele blowhole, but one to the west of what are sometimes called the Olivine Pools).
Anyway, we think these little geological gems are simply amazing. My wife gets very nervous around them, and while we were kept well away from La Bufadora in Mexico, in Hawaii we were able to walk right up to them. My wife literally was pulling on my arm to keep me from going over next to them. I laughed and reminded her that it's only dangerous if you fall in, and despite what she sometimes thinks I really do have a healthy sense of self-preservation, some evidence to the contrary.
In any case, the Halona Blowhole didn't disappoint us. It was spouting well and frequently. I managed to get my wife to go near it to get this photograph.
Much later, when her paranoia levels decreased, she dared me to go over and sit down next to it. I don't think she believed I'd do it, but I took my chance and quickly ran over just in time to get a face-full of water. It was beautiful.
Since blowholes really do need to be seen to be believed, I've included a little video here. It's awesome.
Seeing this blowhole -- feeling the rocks beneath us shake under the awesome force of the waves as they crashed into the hole, hearing the odd "whoosh" sound that comes as the air is forced out right before the "boosh" of the water -- was one of our favorite parts of our trip to Hawaii. (Actually, I think I'm going to end up saying that an awful lot ...) We liked it so much that even though we saw it one day while we were driving by (when we took the video), we decided to go back a few days later to go hiking down by the blowhole. Awesome.