Welcome to the vibrant Chicago River South Branch, a bustling waterway that not only divides the city but also defines its spirit. Known for its dramatic role in reversing the flow of the entire Chicago River in 1900, this river branch is a marvel of engineering and urban planning. Stretching through the heart of Chicago, it has been pivotal in shaping the city’s economic and cultural landscape.

Did you know that the South Branch of the Chicago River was once so polluted that it was referred to as the city’s stinking river? Today, it stands as a testament to successful environmental rehabilitation efforts. The river is now home to over 70 species of fish, a stark contrast to its earlier days when industrial waste dominated its waters. This transformation is celebrated every year during the Chicago River Day when thousands gather to maintain and appreciate its newfound beauty.

The history of the South Branch is as deep and flowing as the river itself. Originally a meandering marshland river, it was extensively modified in the 19th century to accommodate growing industrial needs. The most astonishing feat was completed in 1900 when engineers reversed its flow—an endeavor aimed at protecting Lake Michigan's freshwater from sewage contamination. This project, one of the largest public earth-moving projects ever completed at that time, dramatically altered both the ecology and economy of Chicago.

For those looking to experience this iconic waterway uniquely, consider kayaking down its length to see Chicago from a different perspective. Spring and early summer are ideal for such adventures when the wildlife along the riverbanks is most active. Also, keep an eye out for hidden gems like Ping Tom Memorial Park—a serene spot often missed by tourists—offering some of the best skyline views and a quiet place to escape city life.

Imagine witnessing a river that flows backward! The reversal of the Chicago River's flow is not just an engineering milestone but also an event that reshaped U.S. environmental policies. It led directly to significant advancements in American sanitation and public health standards. Moreover, during St. Patrick’s Day celebrations, this river turns a vivid green, drawing spectators worldwide who marvel at this stunning transformation orchestrated using an environmentally safe dye.

Just steps away from the riverbank stands Willis Tower, one of America’s tallest buildings and a sky-piercing symbol of Chicago’s architectural ambition. Don’t miss out on visiting The Art Institute of Chicago either; located just a short walk from where you stand, it houses world-renowned collections including works by Van Gogh and Monet.