In 2018, Bremen-based artist Edeltraut Rath transformed the passageway on Nachtigalstraße with a striking mural titled "Up and Down." This passage, connecting Nachtigalstraße with Nordstraße, serves as a metaphor in Rath's work for the journeys we undertake in life. These paths are rarely straightforward; they are marked by highs and lows, the "ups and downs" of existence. Rath captures this dynamic through ascending and descending color diagonals, using abstract forms to represent the fluctuations and challenges we face. The mural's bold design, featuring clear, repetitive shapes and vibrant colors, gives the tunnel a distinct and memorable identity, turning it into an impactful space of experience.