The Norsemen, often called Vikings.
North America
He founded a colony named Vinland.
Newfoundland, Canada.
Iceland, Greenland, Vinland (North America).
Vinland (North America).
Iceland, Greenland, Vinland (North America).
North America.
Leif Ericson.
They called it Vinland, not sure why, but they did!
I assume you are referring to Yggdrasil. It is the world tree, and does not exist in a physical form. As for Vinland, its not a myth. The vikings discovered North America around the year 1000 CE, and they named it Vinland (Wine-land, for the berry bushes). I don't see what Lake Tahoe has to do with anything.
It was probably the part of north America later named Vinland by Leif Eriksson, but its location is still uncertain.