One of the many city natural parks and part of research lab, Museu da Amazonia (aka MUSA) offers nearly 250 acres of nature near the center of Manaus, Brazil. Access the trails, trees, frogs, orchids, and birds, and climb up the 135 foot observation tower with a guide for views over the whole thing.
Created in 1952 and implemented in 1954 - the National Institute of Amazonian Research (INPA) - over the years, it has been conducting scientific studies of the physical environment and living conditions of the Amazon region to promote human well-being and socio-economic development regional economy. Currently, INPA is a world reference in Tropical Biology.