Underground spring. Water flowing through an underground canal into a drain at the Roman Spa,Bath,England. The spa was built around the hot spring in the 2nd Century,but excavated remains have shown evidence that it may have been in use before this time. Hot water,heated underground from the Earth's internal heat,rises at a rate of a million litres per day and a temperature of 46 degrees Celsius. This is the main drain,where waste water flows into the main drain that leads to the River Avon | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Hart-Davis, Adam |
Taille de l’image : | 3418 px × 5111 px |
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Property Release : | Non requis |
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