A map from 1919 of the Panama Canal Zone showing the completed canal, the Panama Railway, the locks, breakwaters and dams, the Caribbean entry at Colon and Pacific entry at the City of Panama, the boundary with the Republic of Panama,...

A relief map from 1920 of the Panama Canal Zone showing terrain features, lakes, feeding rivers, the channel route, dams, locks, railroad, and entrance cities. The Canal Zone is shaded darker, and an inset map shows the entire isthmus...

A map from 1916 of the Panama Canal Zone showing the physical features of the area, including terrain and mountains, rivers, lakes, the continental divide, and coastal features. The map uses color-contouring to show elevations from sea...

A series of maps showing the northern campaigns, forts, and battle sites during the War of 1812, including details of the campaigns of the Army of the Centre (Lundy's Lane, Beavers Dam, and Burlington Heights), campaigns of the Army of...

Irrigation-related dams, spillways, other structures.

Despite being the fact that human remains at the site are the oldest that have been found in Washington, and at the time of excavation, the oldest set of remains found in North America, the site was submerged under water after the...

This was the first Spanish Mission in Alta California and the start of El Camino Real. Originally located in the Presidio of San Diego, it later moved a few miles away. The nearby Old Mission Dam, also a NHL, provided water for milling...

CNN reports in 1999 on China's biggest construction project since the Great Wall, the ecologically controversial building of the Three Gorges Dam on the Yangzi River.

CNN reports in 1999 on China's biggest construction project since the Great Wall, the ecologically controversial building of the Three Gorges Dam on the Yangzi River.

CNN reports in 1999 on China's biggest construction project since the Great Wall, the ecologically controversial building of the Three Gorges Dam on the Yangzi River.

CNN reports in 1999 on China's biggest construction project since the Great Wall, the ecologically controversial building of the Three Gorges Dam on the Yangzi River.

CNN reports in 1999 on China's biggest construction project since the Great Wall, the ecologically controversial building of the Three Gorges Dam on the Yangzi River.

Located in China, the Yangtze River is one of the longest rivers in the world, reaching a length of around 6300 kilometres (3917 miles). This high altitude photo of the Yangtze River shows where the Three Gorges Dam is located. For more...

The University of Michigan provides a PowerPoint presentation on the environmental history of the Great Lakes. Provides aerial shots of the Great Lakes from a satellite, various geographical maps over the Great Lake Region, and pictures...

This site from PBS is for any user wanting test their engineering skills. Take a trip to Craggy Rock and help their growing community decide on four new bridges.

This site from PBS is a great web site for anyone interested in using some engineering skills. Travel to sizzling hot Char County and help the residents decide on three new domes.

An image of Nevada State Monuments.

An image of Nevada State Monuments.

An image of Nevada State Monuments.

An image of Nevada State Monuments.

An image of Nevada State Monuments.

An image of Nevada State Monuments.

An image of Nevada State Monuments.

An image of Nevada State Monuments.