PORTLAND — The Salt Institute for Documentary Studies in Portland debuted an unusual multimedia exhibit Saturday inside a steel shipping container in Congress Square Park.

The exhibit, called “Photoville ME,” features still photos and a series of short-subject, narrative photo essays accompanied by voices and sound. Each piece tells a story about people in Maine engaged in a particular activity or lifestyle.

The subjects include people in Portland who live on their boats, families “living off the grid” in rural Maine, the Portland Boxing Club, and the business of making potato doughnuts.

All of the projects were produced by students at SALT, a one-semester school that teaches photography, writing, broadcasting and multimedia storytelling.

About 15 to 18 students produced the multimedia presentations shown in the exhibit, Salt Institute Executive Director Donna Galluzzo said.

“What we wanted to do is just present a beautiful montage of some of the photos that have been taken over the last few years,” she said.

The exhibit will be on view from 1 p.m. to 8 p.m. daily through Thursday at Congress Square Park.

It will then go on to be a part of a much larger “Photoville NYC” exhibit Sept. 19 to 29 in Brooklyn Park, in New York City. That exhibit will feature local photography from around the country and is expected to draw up to 100,000 spectators.

Portland resident Douglas Barberousse, 45, said he visited the local exhibit Saturday after wondering what a big, metal shipping container was doing in the park.

“It sparked my curiosity,” he said.

Barberousse said he was surprised by what he experienced when he stepped inside the container.

“I thought it was a slide show, but it was actually a really cool documentary,” he said.