Carroll Hall is a hidden botanical walled garden and a series of specialized venue spaces in Bushwick, Brooklyn. A place of stillness, unconcerned with the outside world is offered within these 10,000 square feet of indoor/outdoor space. The project is created from materials of the buildings that were demolished to create it. The garden expresses the geological and natural history of Brooklyn incorporating ideas of time travel and ecology to create immersive, unlikely experiences. Visitors continually discover the unexpected within this crafted architectural framework of real materials and traditional construction techniques. The buildings “breathe” with automated natural ventilation. Handmade mosaic murals tell stories of underground creatures. There are moving walls and secret doors. The plants are an idealized woodland, dressed-up cousins of what might have grown along the edges of fields and farms past. Birds, bees and butterflies are invited back. Fountains and water features collect and recycle stormwater for irrigation. A decade of design and construction of this project led to a complex and interwoven series of architectural ideas. The project whole does not exist without its parts. There is interdependence between plants, animals, people, and architecture. It is a rare and highly specific formal space in New York City.