A trip back to Sheffield, Alabama, is filled with reminders that boundaries aren't just physical.

Throughout this week, CityLab is running a series on borders—both real and imagined—and what draws so many of us to places on the edge.

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  1. a rendering of the moon village with a view of Earth
    Design

    Designing the First Full-Time Human Habitat on the Moon

    SOM, in partnership with the ESA and MIT, wants to accommodate research and maybe even tourism on the moon.

  2. Equity

    The Hidden Horror of Hudson Yards Is How It Was Financed

    Manhattan’s new luxury mega-project was partially bankrolled by an investor visa program called EB-5, which was meant to help poverty-stricken areas.

  3. Design

    The Many Lives of Notre-Dame

    Far from being a single author’s definitive text, the beloved cathedral’s history is a palimpsest.

  4. a photo of a Metro PCS store in Washington, D.C.
    Equity

    What D.C.’s Go-Go Showdown Reveals About Gentrification

    A neighborhood debate over music swiftly became something bigger, and louder: a cry for self-determination from a community that is struggling to be heard.

  5. A photo of couples dancing in a park.
    Life

    The Geography of Online Dating

    When looking for love, most people don’t look far from home. That's what a big-data analysis of interactions on a dating site revealed.