28 lasts for 2 minutes and 13 seconds. For the first 2 minutes, The Announcer makes the following speech (A.K.A. the 28 speech), after which there are 13 seconds of silence until the end:
"I noticed a new ficus tree that was at least a few decades old with curled roots sticking up through the sidewalk that had been rebuilt years ago to accommodate the growth. And long limbs that hung and spread and reached, circling a telephone pole, coming to rest under an adjoining fence that divided an alley from the street.
Later, at the airport, I mentioned it to Glyph, who disliked trees; he told me I should move immediately. He said he lived in a tall building near the financial center where there was no grass or trees, only a sculpture park. I saw her walking in that park once when I was walking in the park. I was surprised to see her. We pretended not to notice each other, given where we were, whose building we were next to, and who might be looking out absent-mindedly from the top floor through a powerful telescope.
We were fighting, too, over something inconsequential, subconsciously dreading what we had to do. Neither of us wanted to cede ground to the other by leaving the sculpture park first, so we threw ourselves into the appreciation, made great looping journeys around and through the pedestrian footways, drank from water fountains when we weren't thirsty, sat on damp benches, nodded with competitive smiles to joggers and tourists and bankers on lunch break and admired, over and over, from every vantage, angle, and perspective the monumental pieces, dull for years, until this day, when our panic coats the concrete and metal forms.
Something is going to happen ... in 28 days."
This one might give quite a specific location: Glyph (and presumably, also The Announcer and the Mysterious Woman) seems to live in a city where there's a sculpture park near a financial center. I couldn't find one, but maybe that could be a lead.