If you want to see the rainforest in all it's glory, take a cruise on the Napo river in Ecuador.
The Napo is a tributary to the Amazon. It is wide, shallow, muddy and ever changing.
Metropolitan tours has a paddle wheel type river boat called the Manatee that cruises the river and from which you embark a hikes thru the jungle, lakes filled with piranha, and a myriad of flora and fauna. Unlike the lodges on the river the Manatee moves with you so you don't have to take buses or long rides in motorized water taxis to get to the scenic areas.
It was great fun.
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