In rainy days the manifold may be full
There are many drains inside
It is quite surprising but the water is clean and it doesn’t smell bad in here.
Wide moderm manifold
Each 300 m there is a way up
Something is drained right through hatches
Waste draining is forbidden
Here the Neglinka falls into the Moskva
Basements of the 19th century
They are about 5-6 m high and more than 100 m long.
The mechanism works by itself..
The basements are so old that they seem to be haunted…
Source ; Englishrussia.com