Food fills the shelves and refrigerated areas, but this isn't the typical grocery store.

The Hubbell Trading Post stands in Ganado, Ariz., and it opened its doors in 1878. It is the oldest operating trading post on the Navajo Reservation in the northeastern region of the state.

When the post opened, the Navajo people had just returned to their traditional homelands after a 10-year exile, known to the Navajo as "the long walk," which is when they were forced out of their reservation and fled to New Mexico.

"There are personal stories, family stories, stories about trading...about wagon drivers...Navajo to use money, how to learn the Navajo language," said Ailema Benally, chief of interpretation at Hubbell Trading Post National Historic Site. (People can learn) what it was like to live here before people started using calendars, clocks, paved roads, electricity...all of that."

Its name comes from John Lorenzo Hubbell, an Albuquerque native who was familiar with the Navajo language and culture. He was invited to go to Ganado, where he began trading from a nearby wash.

The Hubbell family lived at the trading post for generations. They had garden plots and a working farm, which stand there to this day.