Ai Weiwei has created a public art project throughout New York City, with the fences serving as reminders of the barriers between populations and the associated human injustices.
One of the largest installations is Gilded Cage, on the south-east corner of Central Park. It’s 24 feet high, and you can walk inside it.

Another huge installation is under the arch at Washington Square. It blocks off much of the arch but has space for people to walk through it.

At Cooper Union, barriers have been installed in the arches:

At 48 E 7th St., there’s a small fence erected between the two buildings. Ai Weiwei used to live in a basement apartment here in the 1980’s.

There’s a fence on top of 189 Chrystie Street:

Another fence is on top of 248 Bowery: