Eldorado by Edgar Allan Poe.

Gaily bedight,
A gallant knight

,
In sunshine and in shadow,
Had journeyed long,
Singing a song,
In search of Eldorado.

But he grew old—
This knight so bold—
And o’er his heart a shadow—
Fell as he found
No spot of ground
That looked like Eldorado.

And, as his strength
Failed him at length,
He met a pilgrim shadow—
‘Shadow,’ said he,
‘Where can it be—
This land of Eldorado?’

‘Over the Mountains
Of the Moon,
Down the Valley of the Shadow,
Ride, boldly ride,’
The shade replied,—
‘If you seek for Eldorado!’