I took this photo from the top of Torre da Telepar (Telepar Tower). The people you see are the souls who fly over the city (or more precisely, downtown) No photoshop here.
Telepar was the name of the local telecom company, acquired by BrasilTelecom.
The company however maintains the tower open for sightseeing in one of the highest neighborhoods in Curitiba. It's more than 100m high. From the top the visitor can have a 360 degrees view of the city's skyline. Located in Merces district, northern from downtown.