The dive area at Xpu-ha was located at the cenote area. This cenote is not like the others that people talk about diving at. Its more like a lake or mangrove swamp. The water is clear though. (It may have cavern areas but I am not aware of any. We have snorkeled in it. I have read there is a manatee in it, but haven't seen it.They do offer dives in it I believe. I would guess this is where the do the demonstation also but am not sure. We have always stayed at Aventura Spa palace and visited Xpu-ha numerous times. I think typically the demonstration is less than a resort course (but I am not positive). The times I have seen it at Aventura, it looked like get in a swim around in the pool with the scuba gear on with guy that works at the dive shop/excursion desk, I think they do a short talk also. I would highly doubt that a shallow reef dive is included, but I may be wrong. I would trust the people at Dive Aventuras to do a resort course though. You may want to email them and ask about it. If you do dive with them, they will probably pick you up at the resort, so you won't need to worry about Taxi's. The last time we were there was over a year ago, so things could have changed (but doubt it). I do know they have the same owners and same people working there, becuase I look at the weekly reports they write and pics. We will be back there next year hopefully.