We came to the cave during a day stop on a recent cruise when we had hired a rental car.
We arrived just after an English speaking tour had left so had to wait about 30 minutes for the next tour, and are glad we waited.
It is one of the longest volcanic galleries in the world (6 km long)
Anyone complaining that it is claustrophobic needs to remember that it is a cave, and marketed as such, however in most parts you can stand fully erect and the lighting is more than adequate.
Our guide gave excellent explanations and saved a surprise view for the end of the tour; unfortunately you'll need to take the tour to see what this is, needless to say it was worth the wait.
If you own or manage Cueva de los Verdes, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.