I think they lacked the ability to FIND it again. Their navigation tools were relatively rudimentary, and they rarely left sight of a shoreline. It seems likely to me that whomever these Viking dudes were, they were simply blown off course by a storm. Similar things happened to Phoenician sailors a thousand years earlier. They did not have the navigation capabilities to return to where they landed.
http://www.american-firearms.com/history/carthaginians/The%20Carthaginians%20discovered%20America.html
That is kind of sad and funny at the same time.
And I really like the Vikings, but don’t give credit where it is not due.
Really nice exchanging ideas with you and you told me things I did not realize.
And that was good
Regards