Cuevas del Indio
Indian Caves - Viñales
The cave itself has artificial lights and concrete floor, so it's not too strenuous. My father managed it with no problem.
There are some nice stalactites and stalagmites to see, and some scary tales to hear from the guides. Quite nicely done.
At the end is a nice grass area, and a number of touristy souvenir stalls, but actually they are worth a quick glance. There is also a nice cafe on-site.
Getting to Cuevas del Indio:
The Indian Caves are five km north of Viñales. You can get there on the Vinales Open-Top Bus Tour, or in a taxi for about about 3CUC (£)
Entrance Costs for Cuevas del Indio:
Entry to the caves is 5CUC (£).