This is 99% invisible. I'm Roman Mars.

There are currently more than 31,000 post offices in the United States.

There are grand old ones that take up entire city blocks, and there are smaller,

humblet ones hiding away in the backs of general stores in towns across rural America.

But this one in Arizona may be the most rural post office in the continental US.

The soupi post office is located at the bottom of the Grand Canyon.

That's Vivian Campbell. My name is Vivian Campbell, and I am the postmaster of Teach

Brings Arizona. Vivian works closely with the soupi post office, and she says there are only a

few ways to get mail to the bottom of the Grand Canyon. You either have to hike down there,

ride a mule or ride a horse. And so every day, Rainer Shine,

mail gets packed on 10 mules to make a two and a half hour trip into the canyon.

The post office is there to serve the people who live on the Ovasupi reservation.

Ovasupi meaning blue-green water people, named for the waterfall at the bottom of the canyon.

The falls are just magnificent. The water is so blue, it's not even indescribable.

The Ovasupi receive a lot of food supplies, but otherwise their mail is pretty standard fare.

They get packages from Amazon, they get first-class mail, they get bills just like you and me.

The soupi post office was established in 1896, and its existence speaks to the links that the

US post office has gone to connect people with each other and unite us as a country.

Ever since the service was founded in the late 1700s.

I was sitting on my back porch in Wyoming one night, you know,

there's the sun, sank in the golden west, and I just jumped up out of the chair and

and like shrieked at my husband, the post office created America.

...