Over the last several weeks, we've teamed up with WTTW-Chiacgo and PBS for their three-part series, "10 That Changed America." The project explores the architecture, design, and urban planning that revolutionized American communities.

We've examined some of the 10 homes that changed America, like Washington, D.C.'s Langston Terrace Dwellings, and a few of the 10 parks featured in the series, like Seattle's Freeway and Gas Works Parks.

Tonight, the final episode in the "10 That Changed America" series will air with a focus on the 10 towns that changed America. Geoffrey Baer, host and senior editor of the series, looks at places like Levittown, Long Island — an early model for post-war suburbs — to the Pearl District of Portland, Oregon, an experimental neighborhood that is moving away from reliance on automobiles.

Check out the full list of the 10 homes that changed America below, and tune in tonight to learn more.

Philadelphia, PA

Founded by Quaker William Penn as a pacifist outpost, Penn’s plan for Philadelphia was a spacious grid that called for wide streets and enormous residential lots.

(Steve Boyle) 

Salt Lake City, UT

Built by Brigham Young using Joseph Smith’s “Plat of the City of Zion,” Salt Lake City combined smart urban planning with a spiritual mission designed to create a city dedicated to God.

(Alvaro Aguayo) 

Levittown, NY

Riverside, IL

Best known as the designer of New York’s Central Park, Frederick Law Olmsted was the mastermind behind Riverside, one of America’s first planned suburbs.

(Bill Richert)

Pearl District, OR

In Portland, Oregon’s Pearl District, the new and old exist side by side in a community built around public transportation.

(James Clark)

Seaside, FL

A resort town that offers a vision of the future that looks a lot like the past, Seaside was designed by architects Andres Duany and Elizabeth Plater-Zyberk in a style known as New Urbanism.

(Michael Smith)

In 1879, railroad car tycoon George Pullman started building a new factory town south of Chicago that would be a worker’s utopia – or so he thought.

(Bill Richert)

Greenbelt, MD

Greenbelt, Maryland, created to be the antidote to the slum-laden cities of the Depression, would serve as a model for American suburbs for years to come.

(Santos Ramos)

Southwest Washington, D.C.

Southwest Washington is one of the earliest examples of a government “slum-clearing” “urban renewal” program that levelled an established African American community and replaced it with more expensive high rises.

(Santos Ramos)