Ecuador
I went here with a group of people I had been working with and it was the best day of my year long trip.
Advertised as class 2-3 rapids but they were very strong - we were getting thrown over frequently by the rapids, really exciting. Guides were excellent - we also jumped off the riverbanks which was a good 20 metre drop, had mud fights - we were covered. It was just a great day, real adrenaline flowing, funny, exciting and can't say enough about it. Had been rafting before and have been since and they have been tame experiences compared to this.
It's on the main street just by the bridge over the river - you can't miss it.
Search Been there