|Location:||Petar National Park, Ouro Grosso Center. 3km from the Bairro Serra (Serra Village) in Iporanga.|
|Address:||Caverna Ouro Grosso.|
|As far as we know this information was accurate when it was published (see years in brackets), but may have changed since then.
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Caverna Ouro Grosso is definitely a wild cave. It seems it is the location of spelunking tours but they are only for physically fit and not too big participants, as the entrance is very low. Arachnophobia will also disqualify you, as the narrow entratrance is the home of numerous cave spiders - which are protected, of course. A visit of this river cave takes at least four hours, but there are also tours of six to eight hours. Neoprene is a very good idea.