Local bus from Foz Do Iguacu, Brazil, to Puerto Iguacu, Argentina, and after negotiating the border and obtaining some pesos, caught another bus on to the falls national park.
Walked the trails at the base and the top of the falls, getting a rather closer view than on the Brazilian side. Spray from the falls was extremely welcoming given the heat, and it also produced some wonderful rainbows.
The sheer quantity and size of waterfalls is quite remarkable, although the quantity of large tour groups is somewhat annoying!
With a couple of additional passport stamps and a natural 'wonder' ticked off, successfully made it back to Brazil.