Of course, the Darien mentioned in the poem by John Keats, below, is not the same as the one in Connecticut. Keats' Darien is Darien Province in Panama. Locals in Conn. pronounce their hometown, 'dairy-ANN', or so I was told.
The other Darien, the only other one that I have ever heard of: I suppose that ever since Keats wrote this sonnet, people have been pointing out that Vasco Núñez de Balboa, not Cortes, was the first European to see the Pacific Ocean:
On First Looking into Chapman's Homer