Mamirauá Reserve's primary ecolodge is built entirely on floating logs and parked on a lovely river bend well into the reserve. Spacious bungalows have hot-water bathrooms, fans and a small patio with hammock; generous and delicious meals are served in a large common area. Guided excursions include paddling through the forest, sunset and dolphin-spotting trips, and visiting a local community, while researchers give interesting nighttime lectures.
An English-speaking naturalist is at the main lodge at all times (and accompanies some excursions) but most guides speak Portuguese only. There are special packages for jaguar spotting, birdwatching, and photography that include a private guide and a superior room.