DW Gibson reflects on the churches and community service providers put in jeopardy by a combination of policy and paperwork, and what can be done to stop vulnerable institutions from falling through the cracks in the city's annual tax lien sale.

As a pit deepens in Chile, a pile rises in New York City. Dan Adams and Marie Law Adams chart the story of New York's relationship with one mineral — from explosions on a faraway salt flat, across oceans, and to its landing in a dynamic mountain on Staten Island's North Shore.

John Surico traces the processes and policies that bring bodies to rest in New York City's potter's field and reports on the ongoing debate around how this necessary but controversial burial ground is managed.

Shannon Mattern takes us inside two examples of the extensive, yet relatively invisible, infrastructures that drive New York's libraries and explains how their logistical systems shape our physical, political, and intellectual landscapes.

Transportation engineer Henry Perahia discusses his 15 years as the DOT Chief Bridge Officer and sheds light on what it takes to design, construct, and maintain 789 City-owned bridges.

Henry Grabar joins subway historian Joseph Raskin on a tour of the G train, charting a history of proactive investment in infrastructure through the vestiges of uncompleted projects along its route.

Thomas Outerbridge explains the infrastructure of recycling in New York City, touching on how public awareness, household participation, and new recycling technologies can contribute to reducing waste.

Tim Maly takes us on a tour of New York City's landscapes of dredge, and explores how the city's past, present and future are shaped by technologies and processes of what he calls "the greatest unrecognized landscape architecture project in the world."

Steve Duncan — historian, photographer and explorer — reflects on wastewater infrastructure, underground rivers, and the thrills and urban lessons he's discovered beneath the surface of cities.

A book about the Internet's physical infrastructure inspires a closer look at how fiber optic cables are woven — literally — into the city's fabric.