London Astride the River Thames, United Kingdom – May 21st, 201051.5N 0.1W
The River Thames rises in the Cotswolds in Gloucestershire and winds 205 mi (330 km) eastward across south-central England into a great estuary, through which it empties into the North Sea. It is tidal for about 65 mi (104 km). Here, tan sediments spill out of the estuary and line the western coast of the United Kingdom.
One of the world’s most important commercial waterways, it is navigable by large vessels to London, which is visible as a greyish tan area along the river banks in the lower left quadrant. London is situated in southeastern England, some 50 miles (80 km) upstream from Thames Estuary.