Rocinha, built upon a steep hillside overlooking Rio de Janeiro, is the largest favela in Brazil. Covering only .8 square miles, the population of the urbanized slum is estimated somewhere between 70,000 and 200,000. Residents occupy shanties made of concrete and brick that are stacked on top of each other, with some climbing as high as 11 stories.
Delhi, India contains approximately 11 million residents. The neighborhoods of Santosh Park and Uttam Nagar, both pictured here, contain some of the city’s most built-up and densely populated land.