Having visited two of the other caves close to Altamira which are still open to the public, I promised myself to make an extra effort and pay a visit to the replica cave of Altamira in the future (even though my expectations are quite low after having visited the replica caves of Lascaux and Chauvet.
I realise this comment is a couple of years old, but I thought Altamira was the least impressive out of that, Chauvet and Lascaux. Chauvet was probably our favourite, whereas with the Lascaux replica it felt very much like a production line. Altamira you're just left to wander the replica, and sadly we had the misfortune of visiting at the same time as a horde of screaming schoolchildren!
What I find odd is that my video on Altamira is by far my most popular one, it has almost double the views of the next one! Will be interesting to see how the Lascaux and Chauvet videos perform.