RIO DE JANEIRORIO DE JANEIRO — Look at most maps of Rio de Janeiro. The beaches are easy to spot, as are the iconic ocean-front neighborhoods of Copacabana and Ipanema. In the middle is a vast forest.

Illegal and unplanned settlements will grow in cities everywhere as urbanization accelerates. Digital technology can help residents connect to services they need. Finding your way through Rocinha in ...

Authorities in Rio de Janeiro have mapped out areas of Brazil’s second-biggest city that are under the control of criminal organizations, potentially enabling them to better target crime control ...

Besides plenty of local visitors, the International Olympic Committee predicts at least half a million people from overseas will descend on Rio de Janeiro for the Games in August. No doubt lots of ...