 Since the name of the farm so obviously derives from the existence of caves on the premises it shows that there must have been at least more than one cave there at the time, and what is more, impressive enough to give the farm its name.These facts therefore make Hellnahellir at least 700 years old.Hellnahellir's original purpose is a bit dependent on the time when it was built but the later it happened we can suppose it becomes less likely to have been inhabited by people.