And regarding Risco Caido I also tried to organize a visit but the emails were not answered. They apparently do a tour once every week if enough people show interest
I am not sure about that. -though I too read it. The guide at Bentayga indicated to me that it was actually closed in Jan 19.
I found examples of reports from 2016 but I suspect that things might have changed - possibly tied in with the Nomination tko ensure that ICOMOS/UNESCO can have no cause for concern about too many or or inappropriate visits
Here is a link to a blog
of someone who managed to visit in Oct 2018 having waited 3 years to get a place (in Spanish).
A few sentences from it after auto translate - " It is only possible to visit between the equinoxes of spring and autumn, in very small groups -of only 10 places- and previous reservation.
Obviously the seats fly as soon as the registration period opens and if you are not fast (or you are clueless as is our case) you can access or not the visit of Risco Caído will depend on the advance waiting list. And you will not know if you do it until a couple of days before the visit if you receive a call with the good news. Three years of waiting list has cost us access!
It also mentions the upcoming "replica" (I have also seen something about a virtual reality "show")
Here is the official procedure for 2018 - pdf in Spanish - https://visitas.grancanariapatrimonio.com/uploads/18_NORMATIVA_PARTICIPACION_RISCO_CA IDO18.pdf
It confirms that the program is May - Sept only (first trip in 2019 is on May 5th so the !Equinox" is only "approx" and registration starts on April 23rd!!). Max of 12 persons and a min of 6 for it to take place. Free. Viewing only from entrance of caves. Bookings not transferable. Allocation in sequence of request. Documentation of request needed to be shown. Applic on line at https://visitas.grancanariapatrimonio.com/
or in person. Waiting list of 200 will be kept and empty places will be filled from it with NO choice of dates!!! If chosen you will be notified by e-mail and MUST respond with at least 24hrs to spare if unable to attend - or will be blackballed!! Departure from Artnerara Church at 6.45 am - aim to be at cave for 8.00 am astronomical observation (explains why trip is provided only in "Summer" months??) . Entire trip takes 4hrs 30 mins.