More than 10,000 stray cats roam New York City's streets, and the harsh winter months are particularly difficult for these homeless felines. Luckily, these cats have Leslie Farrell. When Farrell moved to a part of the city that was home to a colony of feral cats, she did what she could to help them, including building a small shelter. “As I was building it, I thought to myself, ‘I work in the architectural industry. I should ask architects to build shelters’,” Farrell says.