For the Olympics, lots of expensive sporting venues, not to mention facilities for journalists and accommodation for athletes, are being built.
One of Rio's pitch points in pursuing the Olympics was that all of the sporting venues would be within the city limits.
As for other sporting venues, the Olympic Green Tennis Centre is now used by the Chinese Tennis Association, and several other sports centres are used by universities.
The city will host the 2014 World Cup finals and the 2016 Summer Olympics, and Rio is experiencing massive construction projects, including the rehabbing of neighbourhoods, transport and sporting venues.
Barely weeks before the Games, a major metro line meant to transport spectators to the various sporting venues had yet not been opened, one of the many unfinished projects.
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Part two focuses on the Games' legacy and on the construction of five permanent sporting venues - the Olympic stadium, aquatics centre, velo park, handball arena and Eton Manor - and three other temporary venues.
Once completed it will reopen as the Queen Elizabeth Olympic Park, complete with housing, businesses, parklands and venues to stage sporting, entertainment and community events.
London's Metropolitan Police Service, known as the Met, is undertaking what it says is its biggest-ever peacetime operation, running for 66 days across 1, 000 venues, including sporting and cultural events, and making use of up to 9, 500 police officers on the busiest days.
Brazil has spent billions refurbishing old stadiums and building new venues for the biggest sporting event in the country's history.
After a thunderous summer of drama, noise and sporting glory, the now-famous Olympic venues of East London have fallen silent.
And Olympic venues are free of the advertisements that encircle other sporting arenas.
Sporting events including swimming, cycling and sprinting will take place at venues across the city until Sunday.
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Can London continue to profit from its Olympic Village, its massive stadium, its grandiose aquatic centre, and its numerous venues built expressly for this one-of-a-kind sporting event?
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