Canal

Canals are man-made waterways, usually connecting existing lakes, rivers, or oceans. Irrigation canals are man-made waterways for the delivery of water and preceded the use of transportation canals used by barges or narrowboats on smaller canals, and by ships on ship canals that connect to the ocean.

Miscellaneous

For a time in the early 20th century, it was believed that there were canals on Mars.

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