Pennsylvania

Usually called "the world's largest maze" when it is created every year at this site, the maze, cut into a cornfield, is one of several major "maize mazes" that "crop up" across the country at the end of each summer. The company that operates and promotes...

Bethlehem Steel’s hometown plant in Bethlehem, Pennsylvania, is one of the great monuments to the steel industry. It is much more than just a shuttered and abandoned mill, though it is that too. The plant once occupied 20% of the land in Bethlehem and...

Navy nuclear propulsion lab, owned by the Department of Energy, and operated by Betchel. Engaged in research and development into nuclear propulsion plants, and has a lab and field test facility at the Naval Reactors Facility, within the Idaho National...

A processing facility handling radium, uranium and other ores operated here, in western Pennsylvania, from 1911 to 1957. Radioactive contamination at the site was addressed in the 1980s, and the materials were isolated in a pentagonal disposal cell, and...

Home of the U.S. Army War College, an advanced academic training institution, and a garrison of soldiers, which make up most of the base population. There are 217 acres of offices, classrooms, and historic structures near Harrisburg.

Spanning the Delaware River, this 1,644-foot bridge is one of the longest cantilever bridges in the USA.

The museum, which is located on the site of the world's first oil well, contains information on the industrial technology of the Early Pennsylvania oil industry, and the global impact of oil.

An inactive and well preserved coal mining town, with a museum to the industry located at the site. Part of the well-preserved look is due to the fact that many of the mining buildings were constructed as part of the set of the The Molly Maguires, a...

An abandoned eco-land art site. In 1985 the artist Harriet Feigenbaum planted three circles of willow trees around a pond formed from coal dust runoff in this strip mining site. Currently maintained as a wetland wildlife preserve, but the art site is unkept...

As much as 1,600 tons per day of trash is converted into energy here at this plant, finished in 1994. Billed as the "world's most technologically advanced trash-to-energy plant" by its parent company WMX Technologies, the large waste-handling company. The...

A 17,000-acre National Guard Training site, one of the busiest Guard sites in the nation. Includes machine gun firing ranges, equipment training facilities, an urban assault complex, and an airfield that is especially busy with helicopters. Also on site is...

A museum describing the Johnstown Flood, a disaster that occurred in 1889, when a dam burst and a twenty-million-ton wall of water swept away the town of Johnstown, killing 2,200 people. The museum is located in a former Carnegie library, and shows the film "...

Located at the site of the dam which burst in 1889, killing 2,209 people downstream. The monument consists of a mass grave and a visitors center where the film "Black Friday" is shown. The Johnstown Flood Museum is unrelated to the monument and is located in...

Located on the Delaware River, this is the second largest refinery in the northeast, capable of processing 190,000 barrels a day. Owned by Sunoco and opened in 1902.

A museum about the region's canals, and canals in general. Located in a historical canal system which has been turned into the Hugh Moore Historical Park, containing a preserved system of channels, locks, bridges, and other structures.

Fossil fuel energy research facility owned and operated by the Department of Energy. Primarily involved in coal-based energy research. This 237 acre site in Pittsburgh has around 320 employees. The NETL has a site in Morgantown, West Virginia; Sugar Land,...

One of the largest collections of model trains, with five working model layouts, depicting railway landscapes in New York and Pennsylvania. The emphasis of the museum is toy railroad cars and locomotives, which are displayed in glass cases throughout the museum...

Officially closed in 2001, this was an aviation R&D center north of Philadelphia, operated by the Navy, employing over 1,000 people. Included the Naval Command Control and Oceanic Surveillance Center. Many of the functions of the installation were...

A tourist cave where the tour is conducted from a boat, as much of the cave is flooded with water.

A museum with displays on regional coal-mining. It is adjacent to the Lackawanna Coal Mine Tour, where visitors may enter 250 feet into the mine.

A major military shipyard with four miles of waterfront on the Delaware River, in south Philadelphia. Formerly called the Philadelphia Naval Station and the Philadelphia Naval Shipyard, entities officially closed by BRAC in 1995. Portions of the complex are...

An underground complex, built by the Department of Defense as an emergency shelter and electronic control center. Located underneath 650 acres in the hills near the Pennsylvania/Maryland border, Raven Rock, AKA "Site R", reportedly had a full-time staff of...

A large miniature landscape of villages and scenes, with many mechanical parts, model railways, hills and roads. Partly a stylized and idealized version of the typical landscape of Pennsylvania, with significant historical buildings modeled as well. Much of...

A museum devoted to the indispensible building material, that "liquid rock," known as cement. The museum is located in a grouping of nine 19th century vertical cement kilns. These odd looking structures are the Schoefer Kilns, built in 1893 by David Saylor's...

The first large-scale commercial nuclear power plant in the country opened in 1957, and was decommissioned in 1982. The reactor was taken to Hanford, Washington for disposal. The site is adjacent to a two reactor power plant built in 1976 and 1986, the Beaver...

The notorious site of the worst commercial nuclear accident in the USA, so far. The accident occurred on March 28, 1979, when a valve stuck open allowing coolant to escape the reactor vessel. This emergency situation was exacerbated by attendents who misread...

A 1,100 acre airbase, north of Philadelphia, specializing in anti-submarine training, mostly for Reserve forces.