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721 N Main Street exists today as a mostly-forgotten parking lot for city vehicles. Though a brownfield in disrepair, this site is rich with history and potential. A proposal exists for the 'Ann Arbor Tree Line Trail' - a pedestrian and biking greenway, which closely follows the now-underground and channelized Allen Creek, and jointly, a railroad. Inspired by the woven natural dynamics of a grass basket, this park features paths of multiple elevations and experiences weaving in and out, guiding the visitor through a number of aesthetic pleasing and enticing sensory moments. People visit to have play, explore a range of gardens and habitats, walk across a rooftop garden, and engage with history and current ecology along the iconic 'Allen Creek Commemorative Boardwalk'. This main passage is highlighted with an array of golden flora, surrounding by water-loving plants, to not only support the native ecosystem, but also give a visual reminder of the creek which flows beneath your feet. Unfortunately, daylighting Allen Creek at this site wouldn't be appropriate, as it is located so close to the creek's mouth and hence has the highest amount of accumulated pollutants at this position in the watershed. However, this park celebrates, instead of hides, the industrial history of 721 N Main, while maximizing wildlife potential and human happiness. Beneath the 'Motion Green Roof Garden', the Ann Arbor Ecological and Human History Museum welcomes visitors and neighbors to educate and embrace all aspects of placemaking in Ann Arbor.