3 ms·
Plenty of long water supply tunnels around too[1]. [1] https://en.wikipedia.org/wiki/List_of_longest_tunnels https://en.wikipedia.org/wiki/List_of_longest_tunn
by eCa 4y ago
Plenty of long water supply tunnels around too[1].
[1] https://en.wikipedia.org/wiki/List_of_longest_tunnels https://en.wikipedia.org/wiki/List_of_longest_tunnels