Tagus River, River in central Spain.
The Tagus River is a waterway in central Spain that flows roughly 1,000 kilometers from the mountains near Teruel to the Atlantic Ocean at Lisbon. It crosses dry highlands and deep gorges before winding through greener valleys and passing several large reservoirs along the way.
Medieval merchants used it as a trade route between northern European markets and Mediterranean ports, with Toledo serving as a major stopping point. In the 20th century, engineers built numerous dams along its course to supply water and generate electricity.
Farmers along its banks use centuries-old techniques to irrigate their fields, channeling water through networks of small dams and canals. In riverside villages, you can still see stone washing places where people once cleaned clothes by hand.
Access to its banks varies by section: some spots are reachable through walking trails, while others lie within protected natural areas with restricted entry. During summer, water levels drop noticeably compared to spring, when snowmelt increases the flow.
Its basin contains red sandstone layers from the Triassic period, formed roughly 250 million years ago. These rocks are visible at certain sections along the water and reveal the geological past of the region.
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