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Asón
The
Asón
is a
river
in
Northern Spain
,
flowing
through the
Autonomous Community
of
Cantabria
. Its
source
is in the
Collados del Asón Natural Park
. It
flows
into the
Cantabrian Sea
in
the town
of
Colindres
, where it forms the
Santoña
estuary
which is the most important
Special Protection Area
in
the north
of
Spain
. It has a
length
of
39
km
.
