The Barra Cluster in western Rio is one of the primary hubs of the 2016 games.
The nine venues will host flagship events like gymnastics, swimming, and basketball.
Brazil claims the Park is 82% complete, but some venues are more finished than others...
The velodrome is the furthest behind at only 61% completed.
The tennis center, at 68%, isn't much better.
There's still a ton of work to do on the outer shell of the tennis center.
The new Olympic golf course in the Barra Cluster is the most controversial venue of Rio 2016.
It was built on a nature reserve, and has faced numerous delays over the last five years.
The three stacked "Carioca" venues in the Olympic Park are close to completion.
Carioca 1, site of basketball, is 85% finished.
The smaller Carioca Arena 3, site of the fencing and taekwondo, is at 93%.
One of the most interesting venues is the "Future Arena" in the Olympic Park.
It's one of two temporary venues in the Olympic Park. Brazil says it's 74% complete.
After it hosts handball, it'll be torn down and parts will be donated to public schools.
The Aquatics center, 81% complete is also temporary.
It can fit 18,000 fans, and will host the swimming events.
Next door, the preexisting Maria Lenk aquatic center will host diving and synchronized swimming.
East of the Barra Cluster, the Opening Ceremony will be held at the Maracana.
The iconic soccer stadium will host the track and field events.
About 50 minutes away is the Deodoro Cluster, which will host everything from whitewater rafting to shooting to BMX.
The equestrian center will be there.
The mountain biking center has some nice touches.
The water venues are the most troubling.
Rodrigo de Freitas lake, which will host rowing, is reportedly teeming with viruses.
The waters off Copacabana beach, which will host triathlon, could make athletes "violently ill," according to the AP.
Guanabara Bay, the site of sailing, is among the most polluted waterways in the city.
There are also some infrastructure projects that have yet to be completed. Like new bikes lanes...
And a new highway project that's still in the demolition stages.
Rio's mayor says construction is on schedule, but given how close a few World Cup venues came to not being ready in 2014, expect this to come down to the wire.
The biggest problem facing Rio 2016...
