The poem you're referring to is "
The Road Not Taken" by
Robert Frost. However, the lines you quoted are not from that poem. "Oaxaca and Popocatepetl have stolen his heart away" is not a line from any known poem by Robert Frost, or any other poet for that matter.
It's possible you might be misremembering the poem or the lines.
Could you provide more context or information about the poem you're thinking of?