South America - Side Trip to Argentina Iguazu Falls Only?

I'll be spending 3 weeks in South America in Feb/March and at the end of the trip, I'll have 5 days in BsAs.

I'd really love to see Iguazu Falls, but I have a US passport and will not be going to Brazil otherwise during the trip. From what I understand, I would need to pay the $140 Brazil visa fee in order to see the Brazil side.

Is it worth it to make a side trip from BsAs just to see the Argentina side of Iguazu Falls? If I go, is it worth it to pay the fee to get to see the Brazil side?

Thanks for any opinions.

The Iguazu Falls are pretty cool. I don't think $140 is worth paying unless you are spending an extended period of time in Brazil, but that's just my opinion.

How's your Spanish and/or Portuguese? Not that I condone common 'illegal' activities or anything but: A few years ago some "friends" on the Argentinian side of Iguazu falls slipped a taxi driver some cash to take them over to the Brazil side, Foz de Igaucu. "They" drove straight past the border crossing with no issue at all. They visited the free zoo, explored the town, and saw an awesome capoeira show over an all you can eat Brazilian steakhouse dinner. They were picked up later that night and returned easily and safely to the Argentinian side.

Thanks for the reply. I've seen other people say they know people who've done that, so maybe it's almost common? My Spanish is shabby but I'll be travelling with someone who is fluent, so maybe that will help.

Still, I'm not sure I want to spend the money on plane or bus tickets for a gamble ... so many decisions!

The visa for Brasil is valid for 10 years, so you may find opportunities to visit later.
On the other hand, I've seen only the Brazilian side of the falls and don't regret going there. I needed a visa for Argentina and the trick described above did not work (in the other direction).
Maybe you can go and try, if you can see both sides, the better.