Downtown Los Angeles is a city that contains multiple cities. There is a vibrant patchwork of overlapping cultures within the relatively small urban geography of DTLA. As a pedestrian, one can noticeably detect the cultural changes by just taking a 20-minute walk. Scale, texture, materiality, color, and other atmospheric factors reflect the high contrast of various subcommunities with a strong sense of independent identities. What makes a neighborhood is not necessarily the ethnicity or history, but the existing subcultures and lifestyles. In this study, we looked at a few ways to create urban boundaries.