Managua that Managua will experience a severe earthquake every 50 years or less. Managua features four smaller crater lakes or lagoons within city limits. The most centrally located is the Tiscapa Lagoon in the Tiscapa Lagoon Natural Reserve. Managua, due to its tropical climate, varied topography, naturally fertile soils, and abundant rain and water sources, boasts a great variety of flora. Many different types of trees, some of which are not found elsewhere in the world, appear, including "chilamate"s, "ceibo"s, "pochote"s, "genízaro"s, "tigüilote"s, royal palms, "piñuela"s and "madroño"s (Nicaragua's national tree) surround the city. During the rainy season (May to November),
Managua central departments. This highway is commonly referred to as the "Northern Highway." The "Southern Highway", the southern part of the Pan-American highway, connects Managua to southern departments Carazo, Rivas and others. The "Carretera A Masaya" connects Managua to the departments of Masaya and Granada. The newly reconstructed "Carretera A León" connects Managua with León. All of these highways are in good condition, with little traffic congestion. Infrastructure on the highways is well maintained. This also tends to be true for cities and towns that are served or are in close distance with the freeways. However, this does not yield truthfully