Managua pieces from new promising artists, are exhibited. In the numismatic hall there is a permanent exhibition of Nicaraguan coins, bills, and memorial medals from throughout Nicaragua's history. Managua is also home to "Museo Sitio Huellas de Acahualinca" (the Museum of Acahualinca), where the Ancient footprints of Acahualinca, fossilized Paleo American footprints made 2,100 years ago, are engraved in volcanic ash. The museum is located in west Managua in the Acahualinca neighborhood. In addition to the footprints, the museum also displays artifacts found in other localities around the country. Artifacts such as mammoth footprints, pre-Columbian tools, a skull from León Viejo,
Managua and its economy. To make matters worse, a series of natural disasters, including Hurricane Mitch in 1998, made economic recovery more difficult. After winning the presidential election in 1990, the National Opposition Union began the reconstruction of Managua began in earnest. More than 300,000 Nicaraguans returned from abroad bringing their expertise and needed capital. Businesses mushroomed, new housing projects and schools were constructed, the airport was expanded and modernized, streets were widened, older malls were repaired and new ones were built, and buildings were cleaned up. In 2006, after the Sandinista National Liberation Front came back into power, literacy, health