South Pass, Wyoming
Where Western immigrants crossed the Continental Divide:
"And now, at last, we were fairly in the renowned SOUTH PASS.... We were in such an airy elevation above the creeping populations of the earth, that now and then when the obstructing crags stood out of the way it seemed that we could look around and abroad and contemplate the whole great globe, with its dissolving views of mountains, seas and continents stretching away through the mystery of the summer haze."
—from Roughing It
Go see it: South Pass City