Got over the border and checked into our hostel.

Spent 3 nights on the Argentinian side.
We took the bus to the falls, it's much more spectacular on the Argentinean side you see the huge water crashing downwards.

There is a train that you jump on and off to get to different parts, so after seeing the main part we took the train back down and walked around looking at different angles of the waterfall.
Could even see the Brazilian side from a distant.
There was also a free boat that took you to an island however by the time we got there it was closed such a shame as would have seen the waterfall much closer.

So after three days of chilling and see the waterfall it was time to move on, the cost of buses in Argentina were so expensive so decided to take the bus to Cordoba for £70, on a 21 hours bus ride.