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...

The former Bethlehem Steel headquarters building is located next to the plant (though another tower was later constructed downtown), and is now empty of people, and filled with mold. Bethlehem Steel was perennially the second largest steel company, after U.S...

Bethlehem Steel’s hometown plant in Bethlehem, Pennsylvania, is one of the great monuments to the 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 employed more...

Up on top of the hill above town, Bethlehem Steel’s once secretive and exclusive Research Center has been given to Lehigh University. The former executive showpiece, a function room atop a tower with a view over the millworks and town below, is now part of...

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...

ATI, also known as Allegheny Ludlum, operates a steel complex at Brackenridge, recently expanded with a new $1.2 billion hot rolling plant. The company is one of the leaders in the production of  specialty metals, like titanium, magnesium, and hardened...

The hills and dales around Pittsburgh are still home to more than a dozen steel finishing plants, like this one, at Butler, where the AK Steel Corporation produces a million tons of raw steel a year. Integrated with the mill are rolling and finishing...

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.

Across the Monongahela River from the old Homestead Steel Plant site (now a shopping center) are the remains of the Carrie Furnaces, a preserved ruin of the steel industry. There used to be seven blast furnaces here, smelting iron for the mills at Homestead,...

Twenty miles up the Monongahela River from Pittsburgh is the Clairton Works, the largest coke plant in the USA. It is part of the chain of U.S. Steel’s Mon Valley Works, supplying coke to the blast furnaces at the Edgar Thompson Plant. Coke is baked and...

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...

A few miles up the Monongahela River from downtown Pittsburgh is U.S. Steel’s Edgar Thompson steel plant. The first steel works here were built in 1875 to produce rails for the Pennsylvania Railroad. This was Andrew Carnegie’s first large steel mill purchase...

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...

Pittsburgh’s Homestead Steel Works, once the flagship of the Carnegie Steel Company, has been turned into a shopping center. The steel works which once employed 15,000 people closed in 1986 after more than a century of operation. The plant was demolished and...

This steel finishing plant is one of three separate nearby facilities that are part of US Steel’s Mon Valley Works, along the Monongahela River near Pittsburgh. Coke is generated at the Clairton Works, nearby, which is sent downstream to the Edgar Thompson...

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...

ATI, also known as Allegheny Ludlum, operates a dozen specialty steel plants around the country, including this somewhat mysterious one, with plants on both sides of the Kiskiminetas River, northeast of Pittsburgh.

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.

The Midland Steel Plant is one of nearly a dozen steel plants, some active, some not, along 100 miles of the Ohio River west of Pittsburgh. It is active, and is operated by Allegheny Ludlum, a large specialty metals company, based in Pittsburgh.

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,...

In Coatesville, Pennsylvania, buildings next to an active steel plant are now the National Iron and Steel Heritage Museum. Most of the museum is currently located the former Lukens Steel Company headquarters, a mansion next to the plant. Lukens Steel is the...

One of the old steel building at Bethlehem has been protected, and is the planned future home of the National Museum of Industrial History. The museum was part of the original plan for preserving the site, established by Bethlehem Steel before the company...

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...