This is one of the three tunnels built under the River Thames at Surbiton.
There is a 60ft shaft with a mushroom shaped ventilation shaft and a single cast iron tunnel going to another 60ft shaft across the river.
This is one of the three tunnels built under the River Thames at Surbiton.
There is a 60ft shaft with a mushroom shaped ventilation shaft and a single cast iron tunnel going to another 60ft shaft across the river.
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