Altoona is one of the hubs of the area's tourist industry. Many significant cultural resources are within the city itself, and most of these resources are linked directly to the city's long history as a railroad center. Altoona is in a section of southwestern Pennsylvania that is home to a number of significant cultural and historic resources. The Allegheny Portage Railroad National Historic Site, Johnstown Flood National Memorial, Horseshoe Curve National Historic Site, Staple Bend Tunnel, and the historic iron furnace at Mt. Etna are all within 25 miles (40 km) of Altoona.