Mantadia National Park is located 5 km north of Andasibe. It is delimited to the west by Andasy Fahatelo and Falierana, and to the south by Ankondromorona forest and Fanovana. Analamazaotra Special Reserve is located 27 km from Moramanga, and is delimited by the Route Nationale 2, the secondary road to Andasibe and the railway line between Antananarivo and Toamasina. Maromizaha State Forest (also part of this site) is located 5 km east of Andasibe, and lies south of the Route Nationale 2. The terrain consists of robust hills and mountain ridges, with many valleys and rivers. Maromizaha Forest is more mountainous than the other two areas. Dense, humid evergreen forest covers the site, with the canopy frequently higher than 25 m at lower altitudes (although forest strata are rather indistinct). There are small marshes in valley floors. The Sahatandra and Amboasary rivers flow through Analamazaotra Special Reserve, and the former also supplies a fish-breeding station. About 50 years ago, the forest was selectively logged for timber.
See Box and Tables 2 and 3 for key species. One hundred and thirteen species are known from the site, of which 68 are endemic to Madagascar, including particularly rare species such as Tyto soumagnei and Eutriorchis astur. In Maromizaha, montane species that are rare at the two other sites, such as Atelornis crossleyi, are also found. Xenopirostris polleni occurs in very small numbers. Anas melleri is a rare visitor to wetland areas. Mesitornis unicolor may occur in the area, although this still requires confirmation.
Local practices that threaten the integrity of the site include slash-and-burn cultivation, collection of edible or medicinal products from the forest, and poaching. Analamazaotra or ‘Périnet’ is one of the more popular tourist sites in Madagascar, due especially to the presence of the lemur Indri indri. Many tourists also visit Maromizaha. The railway line from Antananarivo to Toamasina passes nearby. There are graphite mines in the area.