The Carnival in Rio de Janeiro (Portuguese: Carnaval) is a festival held before Lent every year and considered the biggest carnival in the world with two million people per day on the streets. The first festivals of Rio date back to 1723.
The typical Rio carnival parade is filled with revelers, floats, and adornments from numerous samba schools which are located in Rio (more than 200 approximately, divided into 5 leagues/ divisions). A samba school is composed of a collaboration of local neighbours that want to attend carnival together, with some kind of regional, geographical common background.
See some pictures from the Rio Carnival 2017.