From Los Antiguos we have booked a trip for 50 EUR per person (blue dollar rate) with Chelenco Tours to the Cueva de las manos. We also looked into renting a private car or a remise, but the next private car available would have been in Comodoro Rivadavia, a 5 hour drive away, and even when we were there earlier all rental cars were sold out short term. We didn't take the remise (kind of taxi) as we thought from a tour would give us more information for not much more money.  
 
After a roughly two hour drive, the first part along spectacular glaciar formed landscape of Lago Buenos Aires, the second on famous ruta 40 and the last part on a bad gravel road going up and down through the steppe with some spectacular rock formations we have reached the visitor center at 11 a.m. on a Thursday. Based on the other reviews here I expected in this remote place almost no other visitors but I was wrong. The 11 o'clock tour was already full and we were only able to take the tour one hour later with almost 25 visitors mostly spanish speaking. As our Castellan is not good and technical enough yet to understand everything we asked for English explainations also and the guide willingly explained everything in Spanish first and afterwards in English for us and a handfull others.  
 
We walked on the wooden structures along the rock structures in which also the main cave is and got to see the many colourful hands as well as some of the animal paintings and some newer, special paintings which could show stars, a sharmane, the full moon and some foorprints of ñandus and a puma. Additionally you get to see great views of the comparably green valley below the walkway with Río Pintura. Also unfortunately some modern vandalism can be found from the time between discovery and first excavations in 1973 and the time where the site got more protected, I guess latest with its inscription in 1999. 
 
I found the paintings quite fascinating when walking past them however I find it hard to get in my head that the oldest ones originate from around 6300 B.C.. Taking that into account the site is even more fascinating.  
 
On the way back to Los Antiguos Chelenco tours stopped at Tierra de Colores also along ruta 40 where a lookout is visited with views in a valley with colourful rocks of volcanic origin. Colours are mainly red but also white, yellow and even pink.