I'm travelling in two weeks to Iguazu and I plan to visit the Brazilian side of the falls one day, and the Argentinian side the following day. I'm staying at a hotel in Puerto Iguazu and I wonder whether to take tours to the falls or go on my own, by taking a taxi, a bus or maybe a minivan, if there is any. Could you give me some advice on this? What is the approximate cost of a taxi from P. Iguazu to each side of the National Park? Thanks a lot.