big rivers in big cities.

aeb default big rivers cities pinheiros river city sao paulo brazil clean-up depollution river depollution downtown slum panorama garden green water avenue train train track revitalization pinheiro city electricity tower bernini station metro united nations cycle path paulo marginal pinheiros travel urban architecture marginal brazil destination landmark highway cityscape building transportation street road traffic metropolis expressway freeway landscape structure business construction buildings recreation south america office pollution