A map from 1912 of the Panama Canal showing the line of the canal, areas of navigable water, and areas of shallow water that have less depth than the canal. This map also shows the location of cities, dams, the Panama Railroad, and the...

A map from 1920 of the Panama Canal showing the channel route from Colon to the city of Panama with the miles given along the route from Colon, railroad route, lakes, reservoirs, the Gatun dam, locks, and towns along the canal. The map...

A map from 1903 of the Panama Canal Zone showing the Canal Zone boundaries, the channel route from Colon to the city of Panama, railroad route, lakes, reservoirs, locks, and towns along the canal. Map notes indicate the minimum depth of...

A map from 1919 of the Isthmus of Nicaragua, showing the proposed route of the Atlantic-Pacific canal from Greytown on the Caribbean coast to Lake Nicaragua, then across to Brito on the Pacific coast. The map shows the locations of the...

A map from 1911 of the Panama Canal showing the Canal Zone boundaries, the channel route from Colon to the city of Panama, railroad route, watershed division lines, lakes, reservoirs, locks, and towns along the canal.

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 1920 of the United States Canal Zone showing the completed Panama Canal. The map shows the entrance ports of Colon on the Caribbean Sea and the city of Panama on the Pacific, the Panama Railroad, the original portion of the...

A map of the proposed isthmian canal routes in Nicaragua and Panama between 1848-1884. The map shows the two chief proposals, the Nicaraguan from Greytown on the Caribbean to Lake Nicaragua and Brito on the Pacific, and the Panama...

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,...

Situated in north-eastern Wales, the 18 kilometre long Pontcysyllte Aqueduct and Canal is a feat of civil engineering of the Industrial Revolution, completed in the early years of the 19th century. Covering a difficult geographical...

A map from 1907 of Mexico, Central America, and the West Indies (Greater Antilles to Puerto Rico) between the Spanish-American War in 1898 and the Third Pan-American Conference in 1906. The map shows the political boundaries in 1906,...

Extending 135 km around the city of Amsterdam, this defence line (built between 1883 and 1920) is the only example of a fortification based on the principle of controlling the waters. Since the 16th century, the people of the Netherlands...