PARK(ing) Day got its start in 2005, and has since become a global celebration of public space in urban contexts. As a firm, Ayers Saint Gross celebrates sustainability and the importance of green spaces as a necessary part of good urban design. This year the DC office was thrilled to tackle a parking space in NoMa and turn it into an “endless park.” The goal was to get passersby from the NoMa community to disrupt their daily routines and immerse themselves in an unexpected retreat while learning about urban sustainability practices. We created our pop-up park out of salvaged wooden pallets from a local construction site, fresh layers of sod, and (most importantly) a series of mirrors. Mirrors have long been a go-to move for making interior spaces seem larger; we figured they could do the same thing for an outdoor space. Thus our mirrors faced each other, creating the illusion of an infinite, endless park. We also had a series of posters informing park-goers about urban sustainability. All together it made for a relaxing and informative spot. Of course, the best urban design is not delivered from on high; it is a collaboration between the designers and the community. With that in mind, we wanted to include an interactive element in our park. We asked pedestrians to contribute by writing thoughts, activities, and feelings about parks and sustainability on tags. The tags became petals on flower-like stakes that were laid out on the park’s grass, creating a “endless” field of wildflowers in the mirrored reflection. As we grew our field of flowers throughout the day, it became a beautiful metaphor for the endless benefits of sustainability. To support sustainability once more at the conclusion of the day, our team returned the wood pallets to the construction site and planted the sod nearby in NoMa. The mission of PARK(ing) Day is to call attention to the need for more urban open space, to generate debate around how public space is created and allocated, and to improve the quality of urban human habitat. While our “endless park” lasted only a day, creativity and a thoughtful approach to urban space are ever-present parts of our firm’s philosophy.