As cookie-cutter condominiums and starchitect-designed towers continue to crowd the Lower Manhattan skyline, try the photographer Adam Friedberg, a 25-year resident of the East Village, has pledged to photograph every single-story building remaining in his downtown community. “They open the street to the sky, providing a vista that can be enjoyed by all of us,” Mr. Friedberg said. Inspired by the work of Bernd and Hilla Becher, Mr. Friedberg catalogs the negative space created by these “low riders,” before the gaps they leave in the city’s landscape are filled in and forgotten. — JAMIE SIMS