On every wall are blasts of color reaching one, two or even three stories above the curb.

We are all to an extent on display to each other, but we pretend not to notice, and do not to attempt to bridge the narrow spatial but chasm-like psychological gaps between buildings.

Christopher Payne -- whose photographs have documented abandoned structures, obsolete industrial processes, and American craftsmanship -- discusses photography's potential to remind us of our disappearing histories.

One series of photographs by Peter Baker, caught my attention for its acute sensitivity to the interplay between individuals and the built environment.

Anita Durst and Kim Schnaubert talk about how we can support artists and improve the economic and cultural vitality of our cities by repurposing under-utilized and empty spaces.

From a personal story of industrial decline to a national exploration of energy production, the artist discusses the themes that connect his body of work, including his current exhibition of photographs of some of New York's extraordinary and idiosyncratic trees.

The founder and the director of an organization that revitalizes neighborhoods by curating exhibitions in empty spaces discuss their process of transforming a Bronx landmark into a temporary venue for contemporary art.

The director of an MTA program to bring visual art and performance to New York City's public transportation system talks about activating spaces of infrastructure, improving rider experience and harnessing the power of public art.