[2] Currently, the 43 thousand square meters of the Anhangabaú Valley are used as a crossing point for people wishing to transit between the east and west regions of the center, and can be defined as an extensive boardwalk under a road junction.

[2] The indigenous people considered the river cursed and, currently, it is channeled and hidden, except for its springs, which are outdoors, between the regions of Vila Mariana and Paraíso.

[2] Because of its size, the Valley was the scene of historical facts of great national importance, such as the inauguration of the Viaduto do Chá in 1892, the channeling of Anhangabaú River in 1906, and the replacement of the park's gardens by avenues, in 1940, following the architectural changes of the city.

The code contained some rules that provided improvements to the soil issue in the cities, such as more trees, paving the streets and draining wet land, which indicated that the drainage of the floodplains of São Paulo became a norm.

Even with so many suggestions for urban improvement, despite their proposals, the complexity of elaborating the works was greater than what monarchic governments could act at that moment, so they were not carried out.

In the following decade, an underground connection was created between the Ramos de Azevedo and the Patriarca squares: the Prestes Maia Gallery, where the city's first escalators were installed.

The east side of the valley was gradually remodeled in the middle of the 20th century, with the demolition of the three Palacetes Prates, between 1935 and 1970, giving way to taller buildings.

The urban planners Jorge Wilheim and Rosa Grena Kliass were the winners, proposing a revitalization project that created a slab over the existing avenues on the site, at a height sufficient to connect the two sides of the Valley, with the car traffic falling below and recreating the green area between Viaduto do Chá and Viaduto Santa Ifigênia.

The movement happened spontaneously and had repercussions at the national level, as the people exercised their political power through the desire for direct elections to choose the president of Brazil.